Nicktoons:HIT 'N' RUSH!

Plot
A UFO flies onto Nicktoons City

Spongebob Squarepants

 * Spongebob
 * Patrick Star
 * Squidward
 * Sandy
 * Mr. Krabs
 * Larry the Lobster (in The Fast & The Buffest)

The Loud House

 * Lincoln Loud
 * Clyde McBride
 * Lori Loud
 * Leni Loud
 * Luna Loud
 * Luan Loud
 * Lynn Loud
 * Lucy Loud
 * Lana Loud
 * Lola Loud
 * Lisa Loud

Welcome To The Wayne

 * Ansi Molina
 * Olly Timbers
 * Saraline Timbers

Doug

 * Doug
 * Porkchop
 * Patti
 * Skeeter

Rugrats

 * Tommy Pickles
 * Chuckie Finster
 * Phil DeVille
 * Lil DeVille
 * Angelica Pickles

The Ren & Stimpy Show

 * Ren
 * Stimpy

Rocko's Modern Life

 * Rocko
 * Heffer
 * Filburt

Aaahh!!! Real Monsters

 * Ickis
 * Oblina
 * Krumm

Hey Arnold!

 * Arnold
 * Gerald
 * Helga

The Angry Beavers

 * Daggett Beaver
 * Norbert Beaver

CatDog

 * CatDog

The Wild Thornberrys

 * Eliza Thornberry
 * Debbie Thornberry
 * Nigel Thornberry
 * Marianne Thornberry
 * Darwin Thornberry
 * Donnie Thornberry

Rocket Power

 * Otto
 * Regina
 * Twister
 * Sam Dullard

The Fairly OddParents

 * Timmy Turner (Can transform into Cleft)
 * Cosmo
 * Wanda
 * Poof
 * Sparky

Invader Zim

 * Zim
 * GIR
 * Gaz

Chalk Zone

 * Rudy Tabootie

Jimmy Neutron

 * Jimmy Neutron
 * Goddard
 * Carl Wheezer
 * Sheen Estevez
 * Cindy Vortex

My Life As A Teenage Robot

 * Jenny Wakeman
 * Brad Carbunkle

Danny Phantom

 * Danny Phantom
 * Sam Manson

Avatar: The Last Airbender/The Legend of Korra

 * Aang
 * Katara
 * Sokka
 * Toph
 * Prince Zuko
 * Korra

The X's

 * Tucker X
 * Trudy X
 * Tuesday X
 * Truman X

El Tigre

 * El Tigre (Can transform into Manny Rivera)
 * Frida Suarez
 * White Pantera
 * Puma Loco

Tak And The Power Of Juju

 * Tak
 * Jeera

Back At The Barnyard

 * Otis (with Pip)
 * Pig
 * Abby
 * Freddy
 * Peck
 * Bessy
 * Duke

Fanboy & Chum Chum

 * Fanboy
 * Chum Chum
 * Kyle

T.U.F.F Puppy

 * Dudley
 * Kitty Katswell
 * Keswick

Teenage Mutant Ninja Turtles

 * Donatello
 * Michelangelo
 * Raphael
 * Leonardo
 * April O' Neal

Sanjay And Craig

 * Sanjay
 * Craig

Bikini Bottom

 * Flying Dutchman


 * Vlad Plasmius
 * Skulker
 * Ember


 * Jorgen Von Strange
 * Mr. Crocker


 * Plankton (Can change into Mech Suit form)
 * Shredder
 * MR.X

NPC's

 * Snotty Boy (one of the attackable characters)