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 creates an army of monstrous creatures so he can accomplish this. Because of this, a few familiar characters are assembled and must travel to different dimensions and unite other heroes for the ultimate battle. This ragtag team includes SpongeBob SquarePants, Lincoln Loud, Bessie Higgenbottom, Jenny Wakeman and Raphael. Can they restore order to the Nicktoon multiverse? Or could the threat be much bigger and badder than they first thought?

Major characters

 * Tom Kenny as SpongeBob SquarePants
 * Asher Bishop as Lincoln Loud
 * Amy Poehler as Bessie Higgenbottom
 * Janice Kawaye as Jenny Wakeman/XJ-9
 * Josh Brener as Donatello
 * Debi Derryberry as Jimmy Neutron
 * Richard Steven Horvitz as Zim
 * Rikki Simons as GIR
 * John Cena as Baron Draxum

Minor characters

 * Ben Schwartz as Leonardo
 * Brandon Mychal Smith as Michelangelo
 * Omar Benson as Raphael
 * Andy Berman as Dib Membrane
 * Tara Strong as Timmy Turner
 * David Kaufman as Danny Fenton/Danny Phantom
 * Carlos Alazraqui as Rocko Rama
 * Nick Bakay as Norbert
 * Richard Steven Horvitz as Daggett
 * Billy West as Doug Funnie, Ren Hoek and Stimpson J. Cat
 * Amy Poehler as Bessie Higgenbottom
 * Jim Cummings as Cat
 * Tom Kenny as Dog
 * 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
 * Daran Norris as Cosmo Cosma
 * Susanne Blakeslee as Wanda Fairlywinkle
 * Janet Varney as Avatar Korra
 * 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.
 * Zim is believed to be the big bad at first before it is eventually revealed to be someone more sinister.