When the game was first released, files for three unused fighters were found. Those fighters are: Garfield (announced as a free DLC on December 7, 2021), Shredder, and Rocksteady. Two unused levels were also found: Garfield's stage called Sweet Dreams and a stage based on the television game show Double Dare. It's unknown why the Double Dare stage was designed when characters that originate from Double Dare are nowhere to be found in the game currently. Items, while not currently present in the game, were also found in the code. Many announcer calls for unreleased characters also exist.
This game's existence was first confirmed by Gamefly.com, with a release date listed for October 5, 2021.
Garfield was announced to be a playable character in a free DLC on December 7, 2021 and was released on December 9, 2021 for the Xbox One, Xbox Series X and Series S, Microsoft Windows, PlayStation 4, and PlayStation 5. The Garfield character free DLC will be available for the Nintendo Switch sometime later on.
Garfield's existence was first leaked through two lineup sheets on a Latin America website on August 27, 2021.
On December 15, 2021, the game's art director Diego Hernandez had announced that official character voice acting, more characters, more stages, and crossplay will be added in a DLC update sometime in 2022.
The game is developed by Ludosity, which had experience with working on the platform fighter genre with Slap City.
A developer from Ludosity, sinxtanx, confirmed via the official Ludosity Discord server that the game will support features and techniques popular or highly demanded by fighting game fans (especially fans of Super Smash Bros).
Features include rollback netcode, private and competitive lobbies, and ranking.
The game has been featured in a few competitive tournaments such as the Nicktoons Throwdown Invitational hosted by Nickelodeon. And the All-Star Nickvitational hosted by Panda, featuring popular YouTubers and Twitch streamers such as Ludwig, MoistCr1TiKaL, JaidenAnimations, ConnorEatsPants and many more.
Target leaked the box-art for Nickelodeon All-Star Brawl the day it was announced, but was eventually changed to only have its logo. The leaked box-art featured unrevealed fighters such as Aang, Korra, Ren, Stimpy, CatDog, and April.
In the character data for SpongeBob, theres mention in the code of an ability called "yummerSummon" which is a reference to the infamous placeholder character, "Yummer" found in SpongeBob Saves the Day!. There are no associated assets to this code and it was simply put there by one of the developers as a joke.
The poses for SpongeBob, Patrick and Sandy's portraits are very similar to promotional art of the characters.
Coincidently, the game was announced on the day of Tom Kenny's birthday, and a day before SpongeBob SquarePants' birthday.
Every fighter has a stage associated with them.
SpongeBob's stage is Jellyfish Fields.
Sandy's stage is Glove World.
Patrick's stage is The Flying Dutchman's ship.
Every fighter has a codename associated with them, possibly to prevent any potential spoilers.
SpongeBob's codename is apple
Patrick's codename is star
Sandy's codename is diver
This is the second time a cartoon channel has been the focus of a Super Smash Bros.' game, with the first instance being Cartoon Network: Punch Time Explosion, which was released on the Nintendo 3DS, Xbox 360, PlayStation 3, and Nintendo Wii in 2011.
Cartoon Network: Punch Time Explosion received mixed reviews, often reasoned because of its flawed roster and not having the amount of care like Super Smash Bros. had.
From what has been revealed, there are 4 fighters from the 1980s, 10 fighters from the 1990s, 4 fighters from the 2000s, and 3 fighters from the 2010s.
Garfield (First animated appearance in May 15, 1980)
Michelangelo, Leonardo and April O'Neil (First animated series starting on December 28, 1987)
Lincoln and Lucy Loud (Debut episode debatably either original June 5, 2014 pilot or series' May 2, 2016 premiere)
This is the first Nickelodeon fighting game on a home console.
The voice actor of Zim from Invader Zim, Richard Horvitz, has confirmed that he did not voice Zim for this game and he is not sure if the game even contains voice acting. Joel Nyström, CEO of developer Ludosity, has since stated that "as we continue to build the Nick All-Star Brawl franchise, we will be reviewing all options, which may include adding VO down the road."
GameMill Entertainment released a 2nd teaser trailer for Nickelodeon All-Star Brawl on August 23, 2021, announcing 8 more mystery fighters are coming. The video was then made private shortly after.
Two more fighters were revealed at Gamescom 2021 on August 26, 2021.
SpongeBob, Patrick, Sandy, Helga, Leonardo, Michelangelo, Reptar, Lincoln, Zim, GIR, Danny and CatDog are the only playable characters from Super Brawl Universe to return in this game.
Music from the shows are referenced in the game's sound track.