I made a roster for a Nickelodeon vs. Cartoon Network fighting game because I was bored and couldn't get the idea out of my head.
NICK:
SpongeBob
Mr. Krabs (Note: you don’t actually play as Mr. Krabs, you play as Squidward while Mr. Krabs gives demands in the background. He takes the credit on the character select and results screens, but the in-battle UI gives Squidward his rightful dues)
Leonardo
Shredder
Reptar
Ren and Stimpy
Rocko
Otto Rocket
Timmy Turner
Zim and GIR (the only puppet character of the many team fighters)
Jimmy Neutron
Jenny Wakeman
Danny Phantom
Aang
Korra
Fanboy and Chum Chum
Lincoln Loud
Miko Kubota
Rango (although still a part of the Nickelodeon brand by technicality, he is considered a guest fighter due to not having his own show)
Danger Mouse (guest character, included due to importance to Nick’s history)
CN:
Finn and Jake
Marceline
Dexter
Johnny Bravo
Powerpuff Girls (the only stance fighter of the many team characters)
Ed, Edd, n’ Eddy
Courage
Samurai Jack
Grim, Billy, and Mandy
Mac and Bloo
Ben 10 (Teen)
Vilgax
Chowder
Mordecai and Rigby
Gumball
Steven Universe (Young)
KO
Mao Mao
Bugs Bunny (guest character)
Fred Flintstone (guest character, chosen over Scooby due to better moveset potential)
While not every show has a fighter, every single original show of both channels will get at least one stage as long as there are no legal issues (sorry, Funnie) and the location or art style is distinct enough to be instantly recognisable. Some live action Nick shows also recieve stages.
SpongeBob
Mr. Krabs (Note: you don’t actually play as Mr. Krabs, you play as Squidward while Mr. Krabs gives demands in the background. He takes the credit on the character select and results screens, but the in-battle UI gives Squidward his rightful dues)
Leonardo
Shredder
Reptar
Ren and Stimpy
Rocko
Otto Rocket
Timmy Turner
Zim and GIR (the only puppet character of the many team fighters)
Jimmy Neutron
Jenny Wakeman
Danny Phantom
Aang
Korra
Fanboy and Chum Chum
Lincoln Loud
Miko Kubota
Rango (although still a part of the Nickelodeon brand by technicality, he is considered a guest fighter due to not having his own show)
Danger Mouse (guest character, included due to importance to Nick’s history)
CN:
Finn and Jake
Marceline
Dexter
Johnny Bravo
Powerpuff Girls (the only stance fighter of the many team characters)
Ed, Edd, n’ Eddy
Courage
Samurai Jack
Grim, Billy, and Mandy
Mac and Bloo
Ben 10 (Teen)
Vilgax
Chowder
Mordecai and Rigby
Gumball
Steven Universe (Young)
KO
Mao Mao
Bugs Bunny (guest character)
Fred Flintstone (guest character, chosen over Scooby due to better moveset potential)
While not every show has a fighter, every single original show of both channels will get at least one stage as long as there are no legal issues (sorry, Funnie) and the location or art style is distinct enough to be instantly recognisable. Some live action Nick shows also recieve stages.