Nicktoons Unite! (Netflix TV series)

Nicktoons Unite! is an American animated action-adventure comedy crossover web television miniseries created for Netflix. It is a crossover of various Nickelodeon cartoons and is loosely based on the video game of the same name.

Premise
Upon accidentally discovering that the universe he inhabits is only one of many, Zim decides to conquer all of them. He puts together an army of nefarious villains so he can accomplish this. This causes serious trouble within other dimensions. Because of this, multiple familiar characters (i.e. TMNT, SpongeBob SquarePants, Lincoln Loud, Jenny Wakeman, Timmy Turner, etc.) are forced to come together for what will be the biggest battle of their entire lives. Can they somehow restore order to the Nicktoon multiverse? Or could the threat be much bigger and badder than they first thought?

Main villains

 * Richard Steven Horvitz as Zim
 * Rikki Simons as GIR
 * Mr. Lawrence as Sheldon J. Plankton
 * Kevin Michael Richardson as Skulker
 * Cree Summer as Vexus
 * Grey Griffin as Azula

Major characters

 * Omar Benson as Raphael
 * Ben Schwartz as Leonardo
 * Brandon Mychal Smith as Michelangelo
 * Josh Brener as Donatello
 * Debi Derryberry as Jimmy Neutron
 * Tara Strong as Timmy Turner
 * Daran Norris as Cosmo Cosma
 * Susanne Blakeslee as Wanda Fairywinkle
 * David Kaufman as Danny Fenton/Danny Phantom
 * Andy Berman as Dib Membrane
 * Tom Kenny as SpongeBob SquarePants and Dog
 * Asher Bishop as Lincoln Loud
 * Janice Kawaye as Jenny Wakeman/XJ-9
 * Jim Cummings as Cat
 * Nick Bakay as Norbert
 * Richard Steven Horvitz as Daggett
 * Carlos Alazraqui as Rocko Rama
 * Amy Poehler as Bessie Higgenbottom

Minor characters

 * Billy West as Doug Funnie, Ren Hoek and Stimpson J. Cat
 * Mason Vale Cotton as Arnold Shortman
 * Benjamin Flores Jr. as Gerald Johanssen
 * Francesca Marie Smith as Helga Pataki
 * Catherine Taber as Lori Loud
 * Liliana Mumy as Leni Loud
 * Nika Futterman as Luna Loud
 * Cristina Pucelli as Luan Loud
 * Jessica DiCicco as Lynn and Lucy Loud
 * Grey Griffin as Lola Loud, Lana Loud, Lily Loud, Sam Manson and Kitty Katswell
 * Lara Jill Miller as Lisa Loud
 * Alanna Ubach as Manny Rivera/El Tigre and Ansi Molina
 * Patrick Warburton as Mr. X
 * Rob Paulsen as Gordon Quid
 * Cheryl Chase as Angelica Pickles
 * Lacey Chabert as Eliza Thornberry
 * Tom Kane as Darwin Thornberry
 * E.G. Daily as Tommy Pickles and Rudy Tabootie
 * Nancy Cartwright as Oblina and Chuckie Finster
 * Bill Fagerbakke as Patrick Star
 * Charlie Adler as Ickis
 * John Kassir as Krumm
 * Candi Milo as Snap
 * Jerry Trainor as Dudley Puppy
 * Rickey D'Shon Collins as Tucker Foley
 * Colleen Villard as Jazz Fenton
 * Jacob Bertrand as Otto Rocket
 * Melissa Disney as Ginger Foutley
 * Hynden Walch as Penny Sanchez
 * Max Charles as Harvey Beaks
 * Angelina Wahler as Fee
 * Tom Robinson as Foo
 * Isabela Moner as June
 * Jace Norman as Henry
 * Hal Sparks as Tak
 * Kevin McDonald as Waffle
 * Wayne Knight as Mr. Blik
 * Amy Winfrey as Charlotte
 * Aglala Mortcheva as Vendetta

Trivia

 * The miniseries consists of less than 13 episodes, each being nearly 30 minutes long.
 * The series takes inspiration from The Avengers and its sequels Avengers: Age of Ultron, Avengers: Infinity War and Avengers: Endgame.
 * Originally planned as a full-length film, the staff turned it into a miniseries to give more characters some screen time.
 * The heroes are split into separate teams, with each of the Teenage Mutant Ninja Turtles on a certain team given their history with alternate dimensions.
 * Zim is believed to be the big bad at first before it is eventually revealed to be someone more sinister.