Amy crawls her way into the air vent leading up to the room where Eggman takes control of the Death Egg. She successfully made her way to that destination. Looking below, she noticed Mecha Sally is there guarding the room.
"Just so you know, Eggman is asleep," the mysterious contact warned her.
"I see," Amy replied back.
"Don't worry, I'll make a distraction for her."
Suddenly, Mecha Sally noticed there's a hologram of some dancing animal. It looks like a monkey dancing around.
"What the...?" she gets distracted by this oversight that she comes closer to it.
Inside the vent, the contact told Amy, "It's gonna keep her distracted long enough for you to get that power source on her."
"Okay," Amy falls from the vent to the floor where Eggman controls his fortress. She sneaks from the Robian squirrel's behind.
"Use the EMP," the voice said and she follows the instruction. Upon activating it, it sends an electric shock that the robotic squirrel is suddenly disabled. "Now, get that Power Ring Matrix off her and change it with that alternate power source."
Following instructions, Amy opens Mecha Sally's back to get the Power Ring off and the power source as well. Next, she puts in the power source she got from her contact. Putting it on, the Robian suddenly returns online and looks surprised that Amy covers her mouth to take precaution steps. Her optics take their direction on Amy.
"One simple question: is that really you, Sally?" she asks the question. The squirrel replied by nodding her head. Amy realizes that the Sally she once knew is back. To top it off, she doesn't even struggle while she's holding her mouth just to keep her quiet. That's enough proof so she drops her hand from her mouth so that she could give her the chance to talk.
"Amy, what are you doing here?" and so her answer is right.
"Isn't that obvious? I'm trying to rescue you," was her reply.
"Wait! I remembered what's going on: the attack on Ken at the Stormtop Village, the attack on Lupe at Wolf Pack Nation, and even worse, the attempt on my brother's life in Feral Forest!" Sally cried on recalling on what she did. To top it off, she looks worried. "Oh no, what have I done?"
Her cry is a little loud that Eggman is about to wake up so Amy hides behind her back.
"Mecha Sally, what's with that noise?" the mad doctor asks.
As Sally looks at her from behind, Amy replied, "Just act like the slave Eggman thought you were."
"Nothing, my master," Sally followed the instruction.
Eggman then drifts back to sleep. That is a very close call to the two. Now that the coast is clear, Amy drops out of hiding and stands beside Sally.
"Don't worry about those things, Sally. Everyone you tried to attack is safe," Amy reassured her friend of what she has remembered of doing while under Eggman's control. "Besides, you're not blame for all that. Eggman controlled you into doing it."
"Speaking of that, Amy, just how did you get my free will back?" the Robian started acting like how she was before being roboticized and asking the question of her subject. "I mean, what did you put behind my back?"
"Well, I found some new power source and I used it to get your mind in the right direction," was the female hedgehog's reply. "Just so you know, it doesn't run out."
"And you did all that by yourself?" was Sally's next question. She asks out of concern as she knows it's too dangerous of doing that task all by herself.
"Well, I have a little help from a mysterious contact," Amy pulls out her communicator and shows it to Sally.
"Yeah, you heard her," the contact's voice is then heard for Sally to start an interaction.
"I see. The question is, who are you?" and those are the first words she said to the communicator.
"That's the same question I'm asking as well," Amy said.
"My, aren't you two waiting for an answer," was the voice's reply. "I'll tell you soon enough. Just get out of this fortress and I'll show myself."
The two girls nodded and start making the move. As they head for the door and exit the room, they're in the hallway. Amy takes another step when Sally puts her arm in front of her direction.
"Wait," her optics scanned the section and in her view, it's filled with lasers. "Just as expected, this section is filled with lasers."
"So you see those with your optics?" Amy wonders about the issue.
"I'm afraid so," was the reply coming out of Sally.
"Wow, she's good," the contact compliments her statement. "Don't worry, Amy, I'll make those lasers visible for you." In a few seconds, the lasers in the section are revealed. It's red and judging by how many of them in the way, it's gonna be difficult. "So, if you want to get pass through, fly through it," more instructions are given out.
"So, just hold on," Sally grabs Amy by her arms and uses her rocket-powered boots to fly across avoiding the lasers. The way to go is straight, left, right, straight, straight, and below.
"Well, that's easy enough," the latter compliments on the situation. As she takes another step, she unknowingly walk into a wet floor that she ended up in a slipping situation. Just as she's about to trip into one of the lasers, Sally grabs a hold of her. "Well, that was a close call," she is relief, but a sweat from her ended up falling into the laser. "Oops."
The alarm is then triggered.
As the alarm is triggered, Eggman suddenly wakes up from the alarm. He noticed that there's something different in the room he's in. One is the Power Ring Matrix and a Power Ring are on the floor, and two...
"Where is Mecha Sally?!"
The robots made their way to the room where the alarm is triggered.
"Is there a way to avoid those robots?" Amy reaches out to the communicator.
"Sorry, but no," was the reply. "You could have just went out to that air vent near Eggman's room early on."
"Well, isn't this just great?" Mecha Sally sarcastically compliments on this statement just as the robots that Amy have avoided come to them. She and Amy prepare their weapons; blades and hammer, respectively.
"I know those robots. It's the ones I've been avoiding," Amy started.
"You've been avoiding them?"
"It's a long story."
The communicator then said, "Yeah, what she said."
Eggman presses a button from his chair and a giant screen appears to talk some of his robots that are in charge with the cameras.
"Just what is going on here?!" he angrily demanded an explanation on what is going on.
"In the moment, master. The camera system should be fine right about... now," as the camera system is activated. Eggman looks at one of the screens that have triggered the alarm. It's none other than Amy and Mecha Sally about to get a fight with the robots. The former takes on the robot on her left as she dodges its attack and pounds it with her hammer while the latter takes on the robot on her right as she cuts it down with her blades.
"What? Mecha Sally? What is she doing with Amy?" Eggman storms out of the room to see that it's true of what he just saw. He looks shock on seeing his greatest robotic slave is fighting with one of the Freedom Fighters.
As they looked at him, Amy takes a look at Sally smiling.
"Should we run for our lives?"
"Yes," was the reply. The two girls then run away from the mad doctor.
"Just as I thought," Eggman makes it clear and points his finger on who to give chase. "After them!"
Sally grabs the communicator while running with Amy.
"Okay, any ideas for an exit?" was her question.
"The disposable chute," was the reply. "Head there. Take the elevator."
"On it," still on the run, the Robian squirrel stops running as an idea comes to her head. On the top of her head, the middle part of hair begins to replace it with a laser cannon zapping the robots pursuing them. "Just a little distraction for our pursuers."
The two run toward the elevator. At the same time, they manage to fight against the robots pursuing them. Upon getting into there, Amy presses the button to activate the elevator. Unfortunately, it's not going to them.
"What the...? Why doesn't it work?"
"Well, thanks to you tripping on the alarm, the elevator can't get to you," the mysterious contact replied.
"Wait, let me try something," the squirrel tries opening the door by force and it did open. It shows the elevator shaft.
"Wow, she's good," was the voice's compliment. "Not only she has smart thinking, but also strong arms."
Mecha Sally compliments on what the mysterious person is saying. "Well, thank you. Now, Amy, just hold on to me because it's gonna be a bumpy ride going from here to the hangar."
"Okay," was the pink hedgehog's reply as she wrap her arms behind Sally's back.
As Sally makes use of her rocket-powered boots, they made their way from the elevator shaft below and fly fast enough to reach to the door where the disposable chute is. Opening it up, she and Amy run off to the chute. They see the lever to activate it. Suddenly, an evil laugh came up to them and then an energy beam just zaps the latter.
"I figured you two would try to leave by using the disposable chute," Eggman shows himself with his flying vehicle, the Egg Mobile. "I don't know how you got your free will back, princess, but I don't have a problem of taking your life as well!"
"Gladly," Sally unleashed the energy blades from her forearms once again.
"To think my greatest Robian slave is against me," Eggman laughs it off. "Well, this time, you have failed me."
As Amy is about to stand up, Mecha Sally stood in front of her, a sign of protecting her life, "No, Eggman, it's just the beginning. And I have a new mission: protect Amy and the people I have hurt under your command!"
"Well then. It's time to fight. Egg Paladins!" Eggman calls on the five Legionized humans who are under his control. It consists of Dutch, Vincent, Honco, Rico, and Spike. This made up the Egg Paladins. At that point, Amy and Mecha Sally put their backs together as the fight begins.
"It's great fighting alongside with you, Sally," the former said.
"Yeah, I'd said the same thing, Amy. Oh, by the way..." the latter replied back as she turn back on the blades. "Since they're just under Eggman's control, just knock them out."
"Attack!" Eggman yells.
Amy takes focus on Vincent, Honco, and Rico as they try to throw punches at her. Fortunately, she dodges those attacks and pounds the former two with her hammer. Now, as for the latter, she dares him to come and as he runs, she gets behind and hits him in the head. Now that's simple. As for Mecha Sally, she takes focus on Dutch and Spike. To put it simple for her to knock them down, she performs a back flip kick on them; the move that she once used on Knuckles.
"Now it's time to send the Metal Series!" the mad doctor shouts as he calls on the Metal Series. It consists of Metal Sonic, Tails, and Knuckles. "Get that Freedom Fighter and your own leader for betraying all of us!"
"Amy, just focus on Metal Tails and Knuckles. I'll focus on Metal Sonic," was the Robian squirrel's suggestion.
"Got it," Amy agrees on that one.
As Mecha Sally fights against Metal Sonic, she zaps him with the laser cannon from her hair. However, it dodges the attack and proceeds to pin her down. Amy tries to get Metal Tails and Knuckles, but the two robots have dodge her attacks and proceed to make punches out of her and toss her to the wall where Sally is.
"Just how do we beat those goons?" the pink hedgehog takes the question.
As Sally thinks, she gets an idea. "Amy, give me that EMP. I know what to do."
She agrees in doing so. As she flies upward, the Robian squirrel activates it and as expected, it disables the Metal Series.
"That's it! I'll handle you two myself!" Eggman unleashed the weapons from his vehicle. It has a giant raygun. As he opens fire, the two girls take into hiding to avoid the shots.
"I know what to do," Amy whispers on Sally what's the move into stopping him. Suddenly, she comes out yelling, "Hey, Eggman, come and get me!"
Eggman takes focus on the former as he opens fire. Luckily, she dodges the shots, but at the same time, Sally manages to get closer to the vehicles. She then flies pass through and use her energy blades to destroy it. Once that is done, Eggman falls to the floor, facing the two in the process.
"It's over, Eggman," Sally pointed a blade into the mad doctor's throat.
"You can't kill me. You Freedom Fighters don't have the guts to kill. That's why I could get away so easily," Eggman boasted upon facing his fate by the hands on his greatest weaponized robot slave.
Suddenly, an energy beam then hits the mad doctor in the head, ending his life permanently. The shot came from an energy gun held by a red echidna who wears completely black and is sinister-looking.
"You know, if there's something I learned about you Freedom Fighters, you don't kill so I decided to spare you two from that path," was her first words.
"Lien-Da," Mecha Sally said the name of the enemy as she shows anger. "What do you want?"
"I think it's about time we talk about this," was the reply. Suddenly, Amy and her friend started to make a fighting stance on her. "You don't wanna do that if I were you two," she pulls out a familiar communicator and talks by it. "Does that look familiar?"
As Amy looks at her communicator, that's what it said. The two girls finally realize the truth.
"It was you? You're the mysterious contact?" was her choice of words.
"My, you look surprised, Amy," Lien-Da started teasing on her before taking focus on her friend. "How about you, Sally? Shouldn't you be surprised?"
"Well, I'm surprised alright," Sally replied back. "Just one question: why did you try to get my free will back?"
"Why? That's because I was shock," the sinister echidna replied as her tone changes into sadness. She recalls on seeing the Robian squirrel on the meeting with the other Grandmasters. Her reaction is that she happens to look shock at this. "I didn't ask Eggman to do this, you know. As a result, I decide to try anyway and get your mind in the right direction as Amy wished for."
"But why couldn't it be you to do it since you already worked for Eggman?" the pink female hedgehog is puzzled from the event.
"What? You expect me to do my own dirty work?!" Lien-Da angrily yells.
Sally teases the villain, "And judging by that tone of your voice, the answer is no."
"That's because Eggman trusts me completely! I can't just waltz in and betray him by 'saving' you just as your friends like her and Sonic keep on saying!" was the reply. "So, I decided to have one of the Freedom Fighters do it for me. I thought about sending Sonic to do it since he's really determined, but sometimes, he just doesn't know the meaning of stealth."
"So that's why you picked Amy to do it, right?" Sally added.
"Exactly," Lien-Da explained more. "Besides, I heard her yelling about how she's getting fed up of how Eggman uses you against Sonic and everyone else so I decided to grant her wish of getting you back. Anyway, just be thankful I saved your butt, princess," suddenly, she pulls out a remote control with a big red button. "Oh, and while you two are busy fighting Eggman, I put up a self-destruct sequence to destroy the Death Egg. That way, this is the way to put an end to Eggman's reign of terror. Oh, and there's also the Dark Egg Legion, but it'll be easier to put them down now that Eggman's dead. So there you have it, you win the war."
"What about the Egg Paladins?" Amy asked the five humans that she and Sally have to take down.
"Don't worry, I'll get them under their own will," Lien-Da reassured the two girls as she pulls a teleportation device on them. "I teleported them to an indestructible prison until they're themselves again. Besides, they also deserve a happy ending."
"Fair enough," Sally said.
"Same here," Amy added.
Just then, more explanation comes by. "By the way, there's also the disappearance of the Chaos Emerald in this fortress. I solved the mystery where it is. It's in you, Sally."
"How did it get inside me?" the Robian squirrel asked.
"Well, it's thanks to you directing the World Roboticizer on you, that's how. Therefore, if you ever turn back into an organic being, just keep it. You'll never know if that might be useful. And now..."
The red echidna pulls the lever of the disposal chute as it opens.
"I think you two should get out," she said.
"That's exactly what we're going to do," Mecha Sally replied as she and Amy started to escape.
"Wait," Lien-Da calls on their attention. "The next time we meet, we're enemies. You got it?"
"Yeah, I got it," Amy said.
"Same here," Sally added.
"Good."
"So, Sally, you have the honor of flying us out of this place?" the female hedgehog asks.
"Sure thing. One exit coming right up," the Robian squirrel replied back. Amy nodded and wraps her arms behind Sally's back. As they left the fortress by the disposable chute, Lien-Da followed as well by using a jet.
Outside, she presses the button to activate the self-destruct sequence. As it counts down to five, it exploded, putting an end to Eggman's reign of terror.