Nicktoons Unite Again

Nicktoons Unite Again is the fourth sequel to Nicktoons Unite. Like the original, it uses a team of up to four characters from Nickelodeon toons. It has 72 characters (excluding DLC). The total is 100 characters (including DLC).

Plot
Spongebob and his many friends realize that a new villain by the name of Ri-Ot the Free-er who freed all the villains from their respective worlds (except for Doug, CatDog and Fanboy/Chum-Chum).

Playable Characters

 * Spongebob Squarepants
 * Patrick Star
 * Danny Phantom
 * Timmy Turner
 * Jimmy Neutron
 * Cindy Vortex
 * Libby Folax
 * Invader Zim
 * Tak
 * Ren Hoek
 * Rocko
 * Jenny Wakeman/XJ9
 * Doug
 * Tommy Pickles
 * Bessie Higgenbottom
 * Eliza Thornberry
 * CatDog
 * Fanboy
 * Chum-Chum
 * Avatar Aang
 * Avatar Wan
 * Avatar Korra
 * Leonardo
 * Raphael
 * Michaelangelo
 * Donatello

Unlockable Characters

 * Mermaid Man & Barnacle Boy (Bikini Bottom)
 * Sandy Cheeks (Rock Bottom)
 * Mr. Krabs (Chum Bucket)
 * Tucker Foley (Amity Park)
 * Undergrowth (Danny's House)
 * Vlad Masters (Ghost World)
 * Cosmo and Wanda (Dimmsdale)
 * Vicky (Fairy World)
 * Mr. Crocker (Chincinnati)
 * Carl Wheezer (Retroville)
 * Goddard (Jimmy's Lab)
 * Ooblar (Yolkus)
 * Ultra-Lord (NegaRetroville)
 * The Herminator (Negatron's Lab)
 * GIR (Dark City)
 * Gaz (Zim's House)
 * Almighty Tallest (Hobo 13)
 * Lok (Pupanunu Village)
 * Jibolba (Juju World)
 * Flora (Dream World)
 * Stimpy (Ren's House)
 * Fire Chief (Streetway)
 * George (Stimpy's House)
 * Heffer Wolffe (Conglom-O)
 * Ed Bighead (Chewy Chicken)
 * Bev Bighead (Welcome to Heck)
 * Nora Wakeman (Tremorton)
 * Brad Carbunkle (Jenny's House)
 * Misty (Tremorton High)
 * Vega (Cluster Prime Streets)
 * Smytus (Vexus' Temple)
 * Spike (Life With The Rugrats)
 * Phil & Lil (Lava Java)
 * Chuckie Finster (Reptar's World)
 * Happy Higgenbottom (San Francisco)
 * Ben Higgenbottom (Bessie's Apartment)
 * Gwen (The Dragonflies)
 * Darwin (African Jungle)
 * Donnie (The Savannah)
 * Nigel Thornberry (Rocky Mountain)
 * Amon (The Land of Raava)
 * Azula (The Fire Nation)
 * Aye-Aye (The Spirit World)
 * Splinter (New York Sewers)
 * Bebop & Rocksteady (New York City)
 * Shredder (Dimension X)

Heroes Pack

 * Squidward Tentacles
 * Sam Manson
 * Crimson Chin
 * Sheen Estevez
 * Dib
 * Party Juju
 * Powdered Toast Man
 * Really Really Big Man
 * Silver Shell
 * Reptar
 * The Mighty B
 * Marianne Thornberry
 * Raava
 * Casey Jones

Villains Pack

 * Plankton
 * Nicolai Technus
 * Gilded Arches
 * King Goobot
 * Tak the Irken
 * Tlaloc
 * Mr. Horse
 * Peaches
 * Vexus
 * Angelica Pickles
 * Portia
 * Siri the Leopard
 * Vaatu
 * Lord Dregg

Spongebob's World

 * Plankton
 * Gary the Snail
 * Bubbles
 * King Neptune
 * Mindy the Mermaid
 * Squidward Tentacles

Danny's World

 * Sam Manson

Timmy's World

 * Denzel Crocker
 * Chester
 * A.J.
 * Tootie
 * Poof
 * Crimson Chin (Without DLC)
 * Mr. Turner
 * Mrs. Turner

Jimmy's World

 * Hugh Neutron
 * Judy Neutron
 * Sheen Estevez (Without DLC)
 * Yolkian Announcer
 * Mr. Wheezer

Zim's World

 * Robo-Parents
 * Ms. Bitters
 * Professor Membrane
 * Invader Skoodge
 * Keef

Tak's World

 * Jibolba (Without DLC)
 * Fauna
 * Dinky Juju
 * Two-Headed Juju
 * Moon Juju
 * Caged Juju
 * Belly Juju
 * Giant Misunderstanding
 * Travis the Dark Juju

Jenny's World

 * Tuck
 * Ptersa
 * Misty

The Avatar's World

 * Iroh
 * Toph Bei Fong

TMNT World

 * April O'Neil
 * Napoleon Bonafrog

Bosses

 * Man-Ray & Dirty Bubble
 * Evil Danny
 * Body of Evil & Nega-Chin
 * Goobot & Poultra
 * Jimmy Negatron & The Herminator
 * Hobo 678
 * Tlaloc & Dream Guardian
 * Mr. Horse
 * Giant Peaches
 * Vexus, Armagedroid & Killgore
 * Reptar
 * The Dragonflies
 * Siri the Leopard
 * Vaatu
 * Shredder and Krang
 * Ri-Ot
 * Me-Ga Ri-Ot

Prologue

 * 1) Training

Spongebob's World

 * 1) Bikini Bottom
 * 2) Rock Bottom
 * 3) Chum Bucket

Danny's World

 * 1) Amity Park
 * 2) Danny's House
 * 3) Ghost World

Timmy's World

 * 1) Dimmsdale
 * 2) Fairy World
 * 3) Chincinnati

Jimmy's World

 * 1) Retroville
 * 2) Jimmy's Lab
 * 3) Yolkus
 * 4) NegaRetroville
 * 5) Negatron's Lab

Zim's World

 * 1) Dark City
 * 2) Zim's House
 * 3) Hobo 13

Tak's World

 * 1) Pupanunu Village
 * 2) Juju World
 * 3) Dream World

Ren's World

 * 1) Ren's House
 * 2) Streetway
 * 3) Stimpy's House

Rocko's World

 * 1) Conglom-O
 * 2) Chewy Chicken
 * 3) Welcome to Heck

Jenny's World

 * 1) Tremorton
 * 2) Jenny's House
 * 3) Tremorton High
 * 4) Cluster Prime Streets
 * 5) Vexus' Temple

Tommy's World

 * 1) Life With The Rugrats
 * 2) Java Lava
 * 3) Reptar's World

Bessie's World

 * 1) San Francisco
 * 2) Bessie's Apartment
 * 3) The Dragonflies' Nest

Eliza's World

 * 1) African Jungle
 * 2) The Savannah
 * 3) Rocky Mountain

The Avatar's World

 * 1) Land of Raava
 * 2) The Fire Nation
 * 3) The Spirit World

TMNT World

 * 1) New York Sewers
 * 2) New York City
 * 3) Dimension X

End Boss

 * 1) The Final Battle
 * 2) The REAL Final Battle

Rating
Rated E10 for cartoon violence.

Voice Cast

 * Tom Kenny as Spongebob, Heffer Wolffe
 * David Kaufman as Danny Phantom
 * Tara Strong as Timmy Turner, Poof, Killgore
 * Debi Derryberry as Jimmy Neutron, Jimmy Negatron
 * Amy Poehler as Bessie Higgenbottom, The Mighty B
 * Billy West as Doug, Ren, Stimpy, Mr. Horse, George, Fire Chief, Powdered Toast Man, Ooblar
 * Lacey Chabert as Eliza Thornberry
 * Grey DeLisle as Vicky, Siri, Sam Manson, Portia, Reptar, Azula
 * Patrick Stewart as King Goobot
 * Jason Marsden as Tak
 * Patrick Warburton as Lok
 * John Kassir as Jibolba
 * Flea as Donnie
 * Nika Futterman as Chum Chum
 * Tom Kane as Darwin, Nigel Thornberry
 * E.G. Daily as Tommy Pickles
 * James Arnold Taylor as Leonardo
 * Nolan North as Raphael
 * Greg Cipes as Michelangelo
 * Rob Paulsen as Donatello, Carl Wheezer, Mr. Wheezer, Party Juju, Tlaloc, Two-Headed Juju
 * Jeff Bennett as Two-Headed Juju, Caged Juju, Pins, Needles
 * Nancy Cartwright as Chuckie Finster
 * Kevin Michael Richardson as Shredder
 * Mae Whitman as April O'Neil
 * Britany Ibiashi as Karai
 * Gary Anthony Williams as Bebop
 * Sheamus as Rocksteady
 * Helmut Bakaitis as Lord Dregg