Travelling through the cosmos was Professor Paradox, Ben 10, his team and The Secret Saturdays "So Professor" said Ben "Who are we recruit next?" and Professor Paradox thought for a minute and then said "Do you remember Rex Salazar Ben, one who can change his limbs into machines?" then Ben had a flashback when he and Rex were fight a giant monster from an another dimension "Yes I do indeed" he said "Good" said Professor Paradox "Because we are travelling to his universe first!" and Ben shouted "YESSSS!" and then a light blue portal appearanced and they all went into it.
Meanwhile on another Earth, in New York City, Rex Salazar (an EVO teenage human boy with black hair and brown eyes and wearing black and white short sleeves t-shirt under a red jacket, black trousers, orange goggles and grey shoes) was fighting a giant squid like monster with Agent Six (a man with dark brown hair and eyes and wearing green battle armour, black shades and holding two swords named Magna Blades) and Bobo Haha (a male EVO chimpanzee with brown fur and a fez and wearing a light brown and light blue army top and a black eye patch over his right eye and holding two red laser pistols) "We need stop it" said Six "Don't worry Six I get it cover" said Rex and he jump into the air and his hands turned into massive orange gauntlets named The Smack Hands, but then the giant squid like monster get him and throw him into the ground "Ow" said Rex and Six shook his head "We so need help" he said "and help, "And you will get it" said Professor Paradox's voice "Monkey was that you?" asked Six "No" said Boba "It was me" said Professor Paradox coming out of a light blue portal with Ben 10, his team and The Secret Saturdays "Hello Rex" said Ben "Ben, is it you?" said Rex and Ben needed his head and Rex smiled at his old friend "Its been a while since we met" said Rex whiling getting up "Yes it has" said Ben and he turn to the giant squid like monster and Rex walked beside him "Hi Ben" said Bobo "Remember me?" "Bobo Haha" said Ben "And you were in a coma when me and Rex first met" looking at Six "Yes I was" said Six "And I don't get your name" said Ben "Its Six, Agent Six" said Six "And We need stop that EVO" pointing to the giant squid like monster and Ben dale the Omnitrix and changed into Humungousaur (a 12 feet tall stegosaurus like humanoid alien with green eyes and wearing a black briefs with a white waistband and a green sash across his chest), Kevin touched one Bobo's laser pistols and his whole body turn red and turn his leaf hand into a big hammer, Gwen had two pink mana discs on her hands, Rook got out his Proto-Tool and The Secret Saturdays all pull out their weapons and all of them change at the giant EVO squid like monster and after a long fight, it was down and Rex change it back into a human

Then everybody was at The Plant were they met Doctor Rebecca Holiday (a woman with brown hair in a bun and green eyes and wearing an orange shirt under a white lab coat, grey skirt and black boots) and White Knight (a man who is complete white with grey eyes and wearing a black shirt under a white suit with black dress shoes under a white battle suit) "So" said White Knight "All you are from a different universe?!" "Yes we are" said Professor Paradox and while he was talking to White Knight, Ben was interviewing his team to Rex "This is cousin Gwen" said Ben "Hi Rex" said Gwen holding out her hand "Hi Gwen" said Rex shaking her hand "And this my best friend Kevin" said Ben "Hi Rex" said Kevin holding out his first "Hi Kevin" said Rex first butting his first "This my Grandpa Max" said Ben "Hello there Rex" said Max holding out his hand "Hi Max" said Rex shaking his hand "fourthly This my partner in The Plumbers Rook Blonko" said Ben "Hi Rex" said Rook holding out his hand "Hi Rook" said Rex "And finally his girlfriend Kai" said "Nice to met you Rex" said Kai holding out her hand "Hi Kai" said Rex shaking her hand "And also this is my dog Zed" said Kevin looking down at Zed and Rex pet Zed on her head "He's very cute" said Rex "Its a she" said Kevin "Oh" said Rex "Then She's very cute" "And over there are The Secret Saturday" said Ben pointing to The Secret Saturday "Hi Rex" them said "Hello there" said Rex "So you need our help to save all of existence" said White Knight "Yes indeed" said Professor Paradox "Well I in" said White Knight "Me too" said Rebecca "Good" said Professor Paradox "But we are not done in this universe, because we need the help of your friend Rex" looking at Rex "Really?" said Rex "Really" said Professor Paradox and with a snap of his finger another light blue portal apperenced "Take this portal and it will lead you straight to your friend's house "Okay" said Rex and he went into the portal and came out the other side by friend's house "Wow" thought Rex "Portals are so faster then driving" then he rang the door bell and a blonde teenage boy with blue eyes opened the door and it was Rex's human friend Noah Nixon wearing a brown, black and white t-shirt under a green jacket, grey trousers and white and black trainers "Hi Rex" said Noah "Hi Noah" said Rex "Noah my team needs your help" "Really?" said Noah excited "Really" said Rex "just go though his portal with me" pointing to the portal "Okay" said Noah unsure, but he followed Rex though the portal and they came to The Plant on the other side "Wow" said Noah "Portals are so fast" "Yeah I know" said Rex "Hello Noah" said Professor Paradox "How do you know my name?" said Noah looking surprised at Professor Paradox "It's one of my powers, I have enhanced knowledge" said Professor Paradox "Well that explains a lot" said Noah "Rex, we also need your old gang help from Hong Kong" he said and with a snap of his finger another light blue portal apperenced and Rex went into it.
Meanwhile in the sewers of Hong Kong Rex's old gang and his girlfriend were being chase by Providence agents, but then they reached a dead end "We are trap!" said Cricket (a female EVO with light green skin, magenta hair and green eyes and wearing a dark t-shirt, a brown sleeveless coat and brown skirt) "And we can't go back" said Skwydd (a male EVO with yellow green hair and blue eyes and wearing a grey jumper, an orange sleeveless coat, blue trousers and brown shoes) "Could we just take down those Providence agents" said Tuck (a male EVO with grey skin and red eyes and wearing a black t-shirt and red trousers) "No, because there 26 of them and only four of us" said Circe (a female EVO with black and purple hair and brown eyes and wearing a grey t-shirt with long light brown sleeves under a short red apron with a skirt a belt, grey trousers and black high-heel boots) "We need a miracle" said Tuck and then a light blue portal appearanced and Rex stepped out it "Hello everybody" he said with a smile "Rex!" said Circe and then she ran to Rex and hugged him tight "Wow, easy there Circe" said Rex "Rex" said Tuck "How did you get here?" "I was sent by someone and he needs all of your help to save all of existence" said Rex and everybody else were shocked "If all of you don't believe me, just follow me though this portal" and they did it and everybody ended up back at the Plant! "Wow" said Tuck "That was fast" "I know" said Rex "And everybody welcome to the Plant" and his old gang and his girlfriend were shocked by their surroundings "Hello there" said Professor Paradox "I'am Professor Paradox and I was the "someone" who sent Rex to get all of you and all of you should know why?" "To save all of existence" said Circe "Correct" said Professor Paradox with a smile and after Rex interviewed his gang and his girlfriend to Noah who was now in a Providence agent uniform and Rebecca was in one too, Ben, his team and The Secret Saturdays, they were all ready to next dimension
Then with their new recruits, Paradox was leading them to another Earth "So" said Zak "Who are we recruiting next Professor?" "We are going recruit a sixteen year old boy named Daniel "Danny" Fenton (AKA) Danny Phantom, his older sister Jazz and his friends" said Paradox "Why?" said Kevin "Because he is Half-human/Half-ghost" said Paradox and everybody else gasped "Wow" said Ben "So if he's Half-human/Half-ghost, that means he will have ghost powers like Ghostfreak" "Yes indeed, but sun light doesn't hurt him" said Paradox and with it, another light blue portal apperenced and everybody went in it!

Author Note: Danny Phantom has two forms: In his human form he has black hair and icy blue eyes and wears a white shirt with a red collar and sleeves and a circle in the middle, light blue jeans, and red and white shoes.
While in his ghost form he has white hair and Neon green eye and wears a strong black and white jumpsuit with a DP logo on it

Meanwhile on another Earth, in a town named Amity Park Daniel "Danny" Fenton (AKA) Danny Phantom was his ghost form, fighting Nicolai Technus (a ghost with green skin, long white hair in a mullet and red eyes under black shades and wearing a long black coat with three green buttons and pockets, a black belt with a rectangular belt buckle, and a light blue-grey cape that covers his shoulders and is held closed at the neck, black boots and green gloves) with his girlfriend Samantha "Sam" Manson (a sixteen-year-old girl with black hair in small ponytail at the top and at the back of her head held by a green hair tie and violet eyes and wearing black choker around her neck, black tank top exposing her midriff with a purple oval in the center, black striped skirt with a green crosshatch design, purple leggings, black combat boots and a pair of black bracelets around both of her wrists), his best friend and the mayor of Amity Park Tucker Foley (a sixteen-year-old boy with black skin, black hair and Turquoise eyes and wearing glasses, long-sleeve yellow shirt, green cargo pants with a black belt, and brown boots along with a red beret) and his older sister Jasmine "Jazz" Fenton (a eighteen-year-old girl with long orange hair with an aqua headband and aqua eyes and wearing a black long-sleeve v-neck shirt, aqua pants, and a pair of simple, black flats) "You may have perfect your duplication, but that isn't enough to stop me this time Ghost Boy" said Nicolai shooting at Danny's doubles while controlling all the technology in Amity Park "Oh really" said Danny dodging lase blast from Nicolai while Sam was shooting at Nicolai with The Fenton Buster.
But then something hit Nicolai and he went down "Nice one, Sam" said Danny "But it wasn't me" said Sam "It was me" said Rex coming out of a portal with the rest of Paradox's team "Quickly" said Paradox "Surround Nicolai Technus" while pointing Nicolai and they did it "Who are all of you and how you know Nicolai Technus?" said Danny "I will explain later Danny" said Paradox and he turn back to his team and Nicolai and Ben turned into Big Chill (a humanoid, moth-like alien whose four wings and antenna can fold up into a hooded robe (much akin to a poncho), giving him the appearance of a phantom) and shot ice at Nicolai "Ow" he said "Its freezing cold" "Its the main idea" said Big Chill and then rest of the team attack Nicolai and then he was down, then Danny suck him into a Fenton thermos "Now who the heck are all of you" said Danny "Not worry young Daniel" said Paradox "We are here recruit you, your friends and your sister!" "Why?"said Danny "Because all of existence needs saving!" said Paradox "And we need your help!" Danny was in shock about this "You mean I will have to leave my parents on their own to protect Amity Park" he said "No, because I can travel in time, we can be back here in 1 second flat after we leaf" said Paradox and then Danny's face light up "Then lets go" said Danny and then he, Sam, Tucker and Jazz went into a portal with Paradox's team and on to next the Earth!