The Grimwood Ghoul Squad and the Mystery to Order gang were heading to Reationex Industries in the Mystery Machine.

-By the way, what is Reationex Industries? - Sibella asked.

-You really don't know what Reationex Industries is? - Marcus asked.

-No. - Sibella answered.

-Wow, Grimwood is more isolated than I thought. - Marcus said.

Reationex Industries is a very famous company around the world. The girls didn't know about that because they didn't know much about the human world.

-Let me explain. Reationex Industries is a company that is responsible for creating clean and safe energy for the environment. - Velma Dinkley said.

-And that's where we're headed now. - Fred Jones said.

-I didn't think I'd see them again. - Shaggy Rogers said.

-Yes, after everything that happened.- Scooby Doo said.

-I don't mind seeing Cassidy again but that bird.- Daphne Blake said.

-Calm down guys. Remember that you're good now.- Fred Jones said.

Marcus and the girls didn't know what they were talking about.

-Uh...what are you talking about?.- Winnie asked.

The gang didn't know what to answer. If they told them the events they lived in the other timeline they would think they were crazy. Even though they were monsters and heroines, they probably wouldn't believe them.

-Girls, what would you think if we told you that we fought against an evil entity from another dimension and that by destroying it we created another timeline, and that we're the only ones who remember that?.- Shaggy Rogers asked.

Marcus and the girls remained silent, trying to process what they said.

-Well...we fought against a monster spider that also came from another dimension. Their story is not very different from what we have lived.- Tanis answered.

-So, do you believe us?.- Daphne Blake asked.

-Yes. So you defeated an evil entity from another dimension?. You are also heroes who saved the world.- Elsa said.

-Well, I wouldn't say that we are heroes. We just solved a mystery that needed to be solved.- Fred Jones said.

-Even so, you saved the world. You have to tell me all the details.- Ghost said.

-Yes, fighting an evil entity from another dimension sounds... Wait a minute!.- Marcus said.

Marcus looked at Velma.

-You met an evil entity from another dimension and still don't believe in the existence of monsters?.- Marcus asked.

With what Velma lived, it shouldn't be difficult for her to recognize that Marcus' students are real monsters.

-I recognized the existence of that entity because I had no scientific evidence to recognize the contrary. I will not admit that your students are monsters, or in spirits, or in magic. Until I find evidence that proves otherwise.- Velma Dinkley answered.

-How do your beliefs work!?.- Marcus asked.

-Stop talking, we're here.- Amelia said.

The group had arrived at the building that belonged to Reationex Industries. The place was under surveillance, there was a barbed wire barricade surrounding the place, security guards patrolling and security cameras everywhere.

-They hadn't told us that Reationex Industries was also a fortress.- Amelia said.

-They're not. They must have secured the place from the attack of the monsters.- Velma Dinkley said.

-So monsters are not allowed?.- Sibella asked.

-How are we going to get in?.- Winnie asked.

-Leave it to me.- Daphne Blake answered.

The group approached the entrance of Reationex Industries with the van. The security guards saw a van approaching and prepared to use their weapons in case they were enemies.

-Stop right there!.- A security guard said.

Marcus and the gang got out of the van.

-Don't shoot! We're not enemies.- Daphne Blake said.

-Identify yourselves.- The security guard said.

-We're Mystery to Order.- Fred Jones said.

-What brings you here?.- The security guard asked.

-We need to use the Reationex Industries equipment to get rid of the monsters that have attacked Crystal Cave.- Velma Dinkley answered.

-Is that true?.- A voice asked.

Three guys came out of the security guards. One was a thin white man with glasses, another was an African-American woman and the third was a parrot. The Mystery to Order gang knew very well who those three were, they were the owner of Reationex Industries Ricky Owens, his wife Cassidy Williams and their pet Professor Pericles. In the other timeline, two of them were enemies of the gang.

-My name is Ricky Owens, I'm the owner of Reationex Industries. This is my wife Cassidy Williams and my pet Professor Pericles.- Ricky Owens said.

-Hi Cassidy. Nice to see you.- Daphne Blake said.

-Do I know you?.- Cassidy Williams asked.

-Oh, right. We don't know each other.- Daphne Blake said.

-Oh, right. We don't know each other.- Daphne Blake said.

The three of them had no memories of the previous timeline.

-You can really get rid of those monsters?.- Ricky Owens asked.

-Yes, Mr. Owens. They are actually humans who were turned into monsters, if you let us use your facilities I can create a cure that will return them to normal.- Velma Dinkley answered.

-Sir, are you really going to believe what those guys say?.- A security guard asked.

-They seem trustworthy. I say let them in.- Professor Pericles said.

-You heard, let them in.- Ricky Owens said.

-Are you sure?.- The security guard asked.

-Pericles has never been wrong about people.- Ricky Owens answered.

-Ah, Mr. Owens. We have more of us in the van.- Marcus said.

-Are there more of you? Tell them to get out now.- Said the security guard.

-You can get out now, girls.- Said Marcus.

The Grimwood girls got out of the van, they were dressed up so they wouldn't know they were monsters. They were wearing clothes that Daphne gave them, they wore sunglasses and scarves so their faces wouldn't be seen.

-Your costumes look great, Daphne.- Said Fred Jones.

-I just hope they don't get caught.- Said Daphne Blake.

-Who are they?.- Asked a security guard.

The gang tried to think of an answer.

-Well?.- Asked the security guard.

-They're our interns.- Answered Shaggy Rogers.

-Your interns?.- Asked the security guard.

-Ah...yes! We're in the business of solving mysteries and these girls want to learn from us.- Answered Fred Jones.

-Yes, we're very interested in solving mysteries.- Said Sibella.

-I love mysteries.- Winnie said.

-I appreciate the opportunity to work alongside Mystery to the Order.- Amelia said.

The group smiled pretending that everything was normal. Ricky Owens looked closely at the Grimwood girls.

-There is something very strange about those girls.- Ricky Owens said.

The group got a little nervous.

-Oh dear, you shouldn't judge people by their appearance. Don't worry girls, you are welcome to enter Reationex Industries.- Cassidy Williams said.

The group let out a sigh of relief.

-Thank you ma'am.- Tanis said.

-Let them in.- Ricky Owens said.

The security guards stepped aside.

-I want you to tell me everything you know about those monsters.- Ricky Owens said.

Marcus, his students and the gang managed to enter Reationex Industries.

What they didn't know is that on top of a hill they were being watched by Franace and a group of monsters. Franace takes out his communicator to inform the Master of the Monsters.

-We already found them, boss. Do you want me to destroy them?.- Franace asked through the communicator.

-Bring me the hippie boy and the talking dog alive, I must taste my revenge in person. Destroy all the others.- The Master of the Monsters answered through the communicator.

-Understood.- Franace said through the communicator.

Franace cut the communication and went with his group of monsters to Reationex Industries.

Inside Reationex Industries, Ricky accompanied by his wife and Pericles, took Marcus and Scooby's group to his laboratory.

-Here, the best in technology in Reationex Industries.- Ricky Owens said.

The place was very large, there was a huge computer and several technological devices. Velma was fascinated by seeing all that technology.

-Gosh! It's fascinating. Can we use it?.- Velma Dinkley asked.

-Everything you need is at your disposal.- Ricky Owens answered.

-Great!.- Velma Dinkley said.

Velma took out the hair sample she had from the vampire.

-Where can I analyze this sample?.- Velma Dinkley asked.

-Put it in the computer scanner.- Ricky Owens answered.

Velma put the vampire's hair sample in the computer scanner. The computer began to analyze it, showing the results on the screen. Ricky was surprised with what he saw on the screen.

-Fascinating, these beings were mutated to become what they are now.- Ricky Owens said.

-The question is. How do we return them to normal?.- Velma Dinkley asked.

-I have it. What if we create a DNA cleaner?.- Ricky Owens asked.

-Yes, a DNA cleaner would be desired from the monster cells that are in his body. Good thinking Ricky.- Velma Dinkley said.

-I'm not the owner of Reationex Industries for nothing.- Ricky Owens said.

-We need to start making enough DNA cleaner for an entire army of monsters.- Velma Dinkley said.

-It will take time.- Ricky Owens said.

-In that case we'll leave them alone to do their thing. How about I take them on a tour of the facilities in the meantime?.- Cassidy Williams asked.

-Sounds good to me. I didn't understand anything they were talking about.- Shaggy Rogers replied.

The group left the lab, leaving Velma and Ricky to do their thing.

-Where would you like to go first?.- Cassidy Williams asked.

-Scooby and I would like to check out your cafeteria.- Shaggy Rogers said.

-Yes.- Scooby Doo said.

-Pericles can guide you there.- Cassidy Williams said.

Pericles flies up and lands on Scooby.

-Aaah!.- Scooby Doo freaked out.

Scooby freaks out when he sees Pericles.

-Hello, I'm Pericles. Nice to meet you.- Pericles said.

-Ah...hello. Nice to meet you Professor Pericles.- Scooby Doo said.

-He's not a professor, he's just Pericles.- Pericles said.

-Ok Pericles.- Scooby Doo said.

Due to the reset of the timeline, Pericles was no longer the same evil bird they knew.

-The cafeteria is over there, just follow my wing.- Pericles said.

Pericles pointed to where the cafeteria was, Shaggy and Scooby headed there until they were stopped by the 5 Grimwood girls.

-Wait! About before... eh... I think you were very brave.- Elsa said.

The girls were talking about when Shaggy and Scooby offered their lives to save them.

-Thanks for trying to help us.- Ghost said.

-Well... you're welcome.- Shaggy Rogers said.

-It was nothing.- Scooby Doo said.

There was an awkward silence between them.

-Well...- Shaggy Rogers said.

-Well...- Sibella said.

-Do you want something from the cafeteria?.- Shaggy Rogers asked.

-We're not okay.- Winnie answered.

-Then...see you.- Shaggy Rogers said.

-See you later- Scooby Doo said.

-Yeah... see you later.- Tanis said.

Shaggy and Scooby went to the cafeteria, there was still tension between them. The 5 Grimwood girls were grateful to them for what happened before but they were still a little hurt. At a distance Marcus, Amelia, Fred and Daphne noticed that the situation was still the same between them.

-It seems that something is going on between them. Did I miss something?.- Marcus asked.

Marcus was with Velma when her students fought with Shaggy and Scooby.

-Those two fools hurt them.- Amelia said.

-What?.- Marcus asked.

-It wasn't their intention. It's just that Shaggy and Scooby have always been scared of monsters.- Fred Jones answered.

-And the girls are hurt that their former teachers think they are scary.- Daphne Blake said.

-I see.- Marcus said.

Marcus never found his students scary but other people might see them differently.

-My friends aren't scary. They're the problem.- Amelia said.

-It's not that simple.- Daphne Blake said.

-Anyway, we have to make them reconcile.- Fred Jones said.

-My students are very sad about their fight with their old teachers. Since their current teacher can't see them like that, I have to do something.- Marcus said.

-But what?.- Daphne Blake asked.

-Do you want to know what to do to make them reconcile?.- Cassidy Williams asked.

-Cassidy.- Daphne Blake said.

-You have to talk to them. A girl talk is what those girls need.- Cassidy Williams said.

-Good idea. Marcus and Fred will go talk to Shaggy and Scooby, and Cassidy, Amelia and I will talk to the girls.- Daphne Blake said.

-Okay, we'll go talk to Shaggy and Scooby.- Fred Jones said.

-I leave my students in your hands.- Marcus said.

Marcus and Fred went to the cafeteria to talk to Shaggy and Scooby. Daphne, Amelia and Cassidy went to talk to the girls.

-Hello girls.- Cassidy Williams said.

-Hello Mrs. Cassidy.- Elsa said.

-Is something wrong?.- Ghost asked.

-You seem to be a little down. Is there something bothering you?.- Cassidy Williams asked.

The girls didn't know whether to answer.

-Well...the truth is...- Sibella didn't finish the sentence.

-It's about Shaggy and Scooby, right?.- Amelia asked.

-Yes.- Sibella answered.

-We just discovered that you always found us scary.- Winnie said.

-They helped us when those monsters had us surrounded but we don't know if their opinion of us changed.- Tanis said.

-So, why don't you ask them?.- Cassidy Williams asked.

-What if they don't want to be our friends anymore?.- Elsa asked.

-We have to accept it. They never wanted to be friends with monsters.- Ghost said.

-That's not true!.- Daphne Blake said.

Daphne approached the girls.

-If they didn't see Shaggy and Scooby as their friends they wouldn't have helped them before.- Daphne Blake said.

-They wouldn't have even saved them from the evil witch back then.- Amelia said.

-That was just because our parents threatened them!.- Winnie said.

The girls' parents, at that parents' meeting, threatened Shaggy and Scooby to protect them or else there would be consequences.

-Even so, they could have just run away and left them alone but they didn't.- Daphne Blake said.

-Well, that's true.- Winnie said.

Shaggy and Scooby would never be able to abandon girls to their fate no matter how scary the thing is.

-Although their fearful nature didn't allow them to stay in Grimwood, I'm sure they've always treasured them.- Daphne Blake said.

-Do you really think that's true?.- Sibella asked.

-Of course.- Daphne Blake answered.

-If you really want to know what they feel you should talk to them.- Amelia said.

-They'll never know if they don't try.- Cassidy Williams said.

-As much as Shaggy and Scooby are afraid of monsters, they don't hate you or want to lose contact with you. That's why before you decide to get them out of your lives you should give them one last chance.- Daphne Blake said.

The girls thought for a moment about what Daphne had told them. Despite their fear of Grimwood, they took care of them, trained them to win the volleyball competition and saved them from the evil witch. That's what real friends do.

-Okay!...we'll go talk to them.- Sibella said.

-I'm not responsible for what happened.- Winnie said.

-Maybe we were a little harsh.- Tanis said.

-We should have let them explain themselves better.- Elsa said.

-Okay girls, it's decided. We won't let things stay like this. We'll talk to them.- Ghost said.

-Yes, we have to.- Sibella said.

-I'm glad. We'll go with you.- Daphne Blake said.

-Okay, let's go.- Elsa said.

The girls went to the cafeteria to talk to Shaggy and Scooby, accompanied by Amelia, Daphne and Cassidy.

In the Reationex industries cafeteria were Shaggy, Scooby and Pericles. Shaggy and Scooby with some trays took all the food they could from the counter, the pile of food on the tray was huge. They sat down to eat it at the table.

-Are you really going to eat all that?.- Pericles asked.

-This pile of food isn't even enough to ease our sadness.- Shaggy Rogers answered.

-At times like this we drown our sorrows in food.- Scooby Doo said.

Shaggy and Scooby began to eat the food, the food was disappearing at an incredible speed. Pericles watched in disgust as Shaggy and Scooby devoured their food. Within seconds they had finished it all. They both burped after seeing they had finished eating.

-Wow. That was amazing.- Pericles said.

-Thanks.- Shaggy Rogers said.

Shaggy and Scooby rested their elbows on the table holding their heads, looking a little melancholic. At that moment Marcus and Fred enter the cafeteria.

-Hey guys.- Fred Jones said.

-How are you?.- Marcus asked.

-Fine.- Shaggy and Scooby answered.

Shaggy and Scooby answered without enthusiasm. Marcus and Fred noticed that they were depressed.

-Do you mind if we sit next to you?.- Fred Jones asked.

-No.- Shaggy and Scooby answered.

Marcus and Fred sat next to Shaggy, Scooby and Pericles.

-And... Have you thought about talking to the girls?.- Asked Fred Jones.

-We have thought about it, Fred, but they have already made it clear that they don't want to know anything about us.- Answered Shaggy Rogers.

-We ruined everything with them.- Said Scooby Doo.

-Oh, come on, not everything is ruined.- Said Fred Jones.

-Yes. I'm sure that if you talk to my students, they will forgive you.- Said Marcus.

-Really?.- Asked Shaggy Rogers.

-Do you believe it?.- Asked Scooby Doo.

-Sure, I'll tell you something. Once Winnie was very angry with me for having lied to her and her friends about who I was, I had lost her trust in me but after talking to her and trying hard to get it back I succeeded. You can too if you try hard to get her trust back.- Said Marcus.

Shaggy and Scooby thought about what Marcus told them. Monsters or not, they were his friends and they weren't going to let things end like this.

-You know what Marcus? You're right. We must strive to regain their trust.- Shaggy Rogers said.

-Yes, Shaggy. Enough of sitting around moping.- Scooby Doo said.

Shaggy and Scooby stood up.

-Enough of hiding! It's time to be brave!.- Shaggy Rogers said.

-No more excuses!.- Scooby Doo said.

-Yes, cheer up!.- Pericles said.

-We'll go see the girls right now and tell them...- Shaggy Rogers didn't finish the sentence.

At that moment the Grimwood girls, Daphne and Cassidy, entered the cafeteria.

-Hey guys.- Sibella said.

-Snails, they're here!.- Shaggy Rogers said.

Shaggy and Scooby were scared when they saw the Grimwood girls, it was a little early for them.

-Now is the time.- Marcus said.

-Talk to them.- Daphne Blake said.

They were facing each other but didn't know what to say.

-This place has everything, right?.- Scooby Doo asked.

-Yes, I've never seen anything like it.- Winnie answered.

There was an awkward silence between them for a moment. Those who were watching could no longer bear it. Marcus and Fred stood up.

-They look like they need a push.- Marcus said.

-Well, we have to give it to them.- Fred Jones said.

-You guys need a little push too.- Cassidy Williams said.

Marcus and Fred pushed Shaggy and Scooby towards the girls; Daphne, Amelia and Cassidy did the same with the girls. Both of them were close to each other.

-We wanted to talk to you about...- They both said at the same time.

At that moment the building's alarm went off. The alarm emitted a red light that covered the entire cafeteria.

-What's that!?.- Sibella asked.

-It's the building's alarm. It seems that we have intruders.- Cassidy Williams answered.

They heard some sounds of people being hit coming from the entrance.

-It's coming from the entrance.- Cassidy Williams said.

-We have to go there.- Marcus said.

-The happy reconciliation will have to wait.- Fred Jones said.

The group ran to the entrance.

When the group reached the entrance they saw that the security guards had been defeated by Franace along with his group of monsters. The group consisted of werewolves, mummies and zombies.

-It's my dad's copy!.- Elsa said.

-I'm not a copy. I'm Franace.- Franace said.

Shaggy and Scooby found that name familiar.

-Don't we know someone named Franace, Scooby?.- Shaggy Rogers asked.

-No idea.- Scooby Doo answered.

-There are monsters in the building!.- Cassidy Williams said.

-Brilliant deduction.- Franace said sarcastically.

Franace looked at Shaggy and Scooby and pointed at them with the hammer she had for a hand.

-You two are coming with me. Eliminate the rest.- Franace said.

The monsters began to approach them to attack them.

-I must ask for reinforcements.- Cassidy Williams said.

-Don't worry, we'll take care of them. Here's the Grimwood Ghoul Squad!.- Marcus said.

-Yes!.- The Grimwood girls said.

The Grimwood girls took off their costumes and threw them into the air, now everyone saw that they were monsters. Cassidy and Pericles were surprised to see them.

-More monsters?.- Cassidy asked.

-They were costumes.- Pericles said.

-Don't worry. They're good monsters.- Shaggy Rogers said.

-They're the Grimwood Ghoul Squad.- Scooby Doo said.

-Those girls?.- Cassidy Williams asked.

-Alright girls, let's get going!.- Marcus said.

-Let's go!.- The girls said.

-TRANSFORMATION!.- Marcus and the Grimwood girls shouted.

A light of energy surrounded their bodies turning them into their hero forms. Marcus was in his black knight form.

Cassidy and Pericles didn't understand what they had just seen.

-What just happened?.- Asked Cassidy Williams.

-It's something they do.- Answered Fred Jones.

-You look good Marcus.- Said Scooby Doo.

-Find a place to hide. We'll take care of them.- Said Marcus.

-Aye!.- Said Shaggy Rogers.

Everyone else who couldn't transform went to a place to hide.

The fight was about to start. The Grimwood Ghoul Squad started fighting the group of monsters. Marcus and Elsa were fighting against Franace, Marcus tried to cut him with his sword but he defended himself with his hammer, Franace hits Marcus with his hammer, throwing him away. Elsa goes and starts to connect several blows to Franace's stomach but they do nothing to him, he was too strong. Franace prepares to hit Elsa with his hammer, she sees it coming and covers herself with her gauntlets, hits her and sends her crashing into the wall, Elsa was able to reduce the impact with her gauntlets. Franace starts to approach her but Marcus goes and jumps on his back, grabbing him by the neck. Franace shakes trying to get Marcus off of her but he holds on firmly, Franace gets fed up with him, grabs him by the neck with her normal hand and lifts him up. Marcus tries to get out of her grip but she had him held on too tightly.

-Is that all you have?.- Franace asked.

At that moment, Elsa charges her electrical energy in her gauntlets, jumps to Franace and punches him in the back of the neck, causing him to release Marcus. That blow stunned Franace.

-Master. Are you okay?.- Elsa asked.

-Yes, I'm fine. Thank you Elsa.- Marcus answered.

Marcus and Elsa joined together to attack Franace. Marcus began to channel his energy into his sword to launch an attack, enveloping it in a dark aura. Elsa begins to charge her energy in her gauntlets to attack.

-DARK CUT!.- Marcus shouted.

Marcus throws a dark cut at Franace and Elsa throws a lightning attack at him. Franace covers herself with both arms to protect herself from the attack, managing to escape unharmed from Marcus and Elsa's attack.

-Did she resist it!?.- Marcus asked.

-It can't be!.- Elsa said.

Marcus and Elsa were shocked that even attacking together they hadn't managed to hurt Franace.

-With such weak attacks you won't be able to defeat me.- Franace said.

-Elsa, this guy is tougher than we thought. Don't let your guard down.- Marcus said.

-I won't, master.- Elsa said.

Franace let out a battle cry and went straight to attack them. Marcus and Elsa also went to attack him, resuming their fight.

Winnie and Tanis were on guard in front of the group of werewolves and mummies.

-Now Tanis!.- Winnie said.

-INVOCATION!. BEETLES TO ME!.- Tanis shouted.

Tanis used his mummy powers to summon a swarm of beetles to attack the group of monsters. The werewolves and mummies were being attacked by the beetles. Winnie took advantage of the situation and attacked them, cutting them one by one with her claws at high speed, until they were all defeated by her.

Sibella and Ghost were back to back, surrounded by half of the group of zombies. The two look at each other and nod. Sibella spreads her bat wings to fly, Ghost uses her freezing powers to freeze the ground below her. The zombies' feet are frozen and can't move, then Sibella flies over them and cuts each one with her sword, finishing off the zombies. Sibella puts herself back to back with Ghost and the two make a heroic pose (Just to show off).

Amelia was in front of the other half of the group of zombies. The zombies were ready to attack her.

-Do you want to come for me? Then try it.- Amelia said.

Amelia began to channel her energy into her body, surrounding herself with a dark blue aura.

-AREA CHANGE! CEMETERY!.- Amelia shouted.

The place around them changed, now it was a cemetery. The zombies wondered what had happened.

-INVOCATION!. LAMENT OF THE DEAD!.- Amelia shouted.

Amelia used her undead powers to summon some ghosts that came out of the graves in the cemetery. The ghosts emitted horrifying chichi dos that made the zombies cover their ears, Amelia was not affected. When they finished, the area returned to normal and the zombies were lying, hugging each other on the trembling floor. They no longer had the desire to fight, they were scared to death.

-And you call yourselves undead? Don't make me laugh.- Amelia said.

Marcus and Elsa continued to fight with Franace, their fight was going badly, he was too strong for them. The other girls go and stand by their side.

-Are you in trouble?.- Sibella asked.

-He's very strong.- Marcus answered.

-He might even be stronger than my dad.- Elsa said.

-Let's go against him all together.- Winnie said.

-Not even all together can beat me.- Franace said.

-That remains to be seen.- Tanis said.

Marcus and the girls began to attack Franace all together.

In the lab, Velma and Ricky were working on the cure. At that moment, the rest of the Mystery to Order gang, Cassidy and Pericles, enter.

-There's trouble! Some monsters just came in!.- Shaggy Rogers said.

Velma and Ricky didn't pay much attention, they continued with their work.

-Let them entertain themselves. We're almost done.- Ricky Owens said.

-How much longer do they have?.- Fred Jones asked.

-There we go.- Velma Dinkley answered.

Velma held up a test tube with a purple liquid.

-With this serum we can return all the monsters to normal.- Velma Dinkley said.

-That's good, Velma. Oh, by the way we're being attacked.- Daphne Blake said.

-What? Why didn't they say it from the beginning?.- Velma Dinkley asked.

-Yes, we did.- Scooby Doo answered.

-But you guys were too focused on your own thing.- Cassidy Williams said.

-Oh, I'm sorry. I was so excited working with all this equipment that I got lost.- Velma Dinkley said.

-Speaking of which. How are the guards doing?.- Ricky Owens asked.

-They were defeated by the monsters.- Cassidy Williams answered.

-The monster girls and Mr. Marcus are fighting the green guy.- Pericles said.

-"Monster girls"? What monster girls?.- Ricky Owens asked.

-By the way Mr. Owens, the girls that accompanied us are actually monsters. We didn't tell you for fear that you wouldn't let us in.- Fred Jones answered.

-What!? They brought monsters to my door!?.- Ricky Owens asked.

-Don't worry dear, they're on our side.- Cassidy Williams said.

-Yes, they are fighting against the group of the green guy as we speak.- Said Scooby Doo.

Velma had an idea.

-This could be our chance to test the serum we created.- Said Velma Dinkley.

-Do you want to try it on them?.- Asked Fred Jones.

-Yes, that way we will see if it works.- Answered Velma Dinkley.

-Well let's go then, maybe Marcus and the girls will need our help.- Said Shaggy Rogers.

The group headed to the entrance, where Marcus and the girls were fighting.

Marcus and the girls were still fighting against Franace. They had him surrounded, so they went and attacked him all together but he got rid of them with a push.

-How are we going to defeat him?.- Asked Ghost.

-If you can't defeat me, you can't defeat the Master of the monsters.- Said Ghost.

-Of course we can! After defeating you, we will go for the Master of Monsters.- Amelia said.

-Well, hurry up, with what he has planned for Crystal Cave, you won't want to waste much time with me.- Franace said.

-What does he have planned for Crystal Cave?.- Marcus asked.

-It's a surprise. If you want to know, defeat me.- Franace answered.

-Master, it seems that we can't waste any more time here.- Sibella said.

-It seems so. Well! First let's defeat this guy and then go save Crystal Cave!.- Marcus said.

-Yes!.- The girls said.

Marcus and the girls had recovered their energy.

-Elsa. Let's combine our forces.- Marcus said.

-Aye.- Elsa said.

Elsa charges her electric energy in her gauntlets and rubs them together. Then she goes and touches Marcus.

-ELECTRIC IMPULSE!.- Elsa shouted.

An electric shock ran through Marcus' veins, giving him great power. His body was surrounded by black electric currents, he pointed his sword at Franace and at lightning speed he went towards him. Marcus moved from side to side like lightning, cutting Franace, his attacks hurt him.

-What!?.- Franace asked.

Franace tried to grab Marcus but he was too fast for him, that made him angry. Marcus stops and prepares to give him the final blow, he begins to charge all the electric energy in his body, wrapping himself in lightning to launch an attack.

-ELECTRIC CUT!.- Marcus shouted.

Marcus throws an electric blast at Franace that when it hits him is as if a lightning bolt had struck him. Franace is roasted by Marcus' attack, lowers his arms and falls to the ground defeated. The battle was over, Marcus and the girls had won. After triumphing, they return to their normal forms.

-That's it.- Marcus said.

-That was a tough nut to crack.- Winnie said.

At that moment, the Mystery gang arrives at the Order accompanied by Ricky, Cassidy and Pericles. They saw the monsters that were lying on the floor.

-Wow. Some girls did all that?.- Cassidy Williams asked.

-I know, right? They're amazing.- Shaggy Rogers said.

Ricky sees the Grimwood girls without their costumes.

-Oh, hello.- Tanis said.

-You did all this?.- Ricky Owens asked.

-Yes.- Elsa answered.

Ricky approaches the girls and takes Amelia's hand.

-Thanks. You haven't saved everyone.- Ricky Owens said.

-It was nothing.- Amelia said.

They thought Ricky was going to be mad but he was actually thankful to them for defeating the monsters and saving their lives.

-Now we must go save the people of Crystal Cave.- Ghost said.

-I'm done making the cure.- Velma Dinkley said.

Velma showed them the cure she and Ricky had made.

-Great. Try it on this guy first.- Marcus said.

Marcus pointed at Franace who was unconscious on the ground.

-He's not dead, right?.- Velma Dinkley asked.

-Oh no, he's just unconscious. The rest of them are too, we would never do that.- Sibella answered.

The Grimwood Ghoul Squad is always careful not to take the lives of their enemies no matter how evil they are.

-Okay, then I'll try it on him.- Velma Dinkley said.

Velma pours the liquid from the test tube on Franace. Her body begins to react to the cure.

-It's working.- Velma Dinkley said.

Franace is back to being human. Everyone saw that the cure had worked.

-Great job, Velma.- Daphne Blake said.

-The cure you and Ricky made, it really worked.- Fred Jones said.

Shaggy and Scooby looked at Franace more closely, now that he had become human again.

-Hey! I know this guy.- Shaggy Rogers said.

-We know him very well.- Scooby Doo said.

Franace was actually someone that Shaggy and Scooby knew. Someone from their past who was hired to eliminate them a long time ago.

-Now I know who the Master of the Monsters is.- Shaggy Rogers said.

-How did we not realize this before?.- Scooby Doo asked.

Shaggy and Scooby had discovered the identity of the Master of the Monsters.

-Good. Now that we know who the Monster Master is, there's only one thing left to do.- Fred Jones said.

- Set a trap?.- Velma asked.

- Exactly. We'll set a trap for him.- Fred Jones answered.

- Fine. Let's put an end to this.- Marcus said.

- The Monster Master will rue the day he messed with our home.- Scooby Doo said.

The group had already discovered who the Monster Master really was. Now all that was left was to design the trap that would stop him once and for all.