Super Fall Brawl is a Super Brawl game on is a fighting character-mash up webgame.It is the 4th and last update of Jingle Brawl,and is would also be the basis for Super Brawl 2.As the title suggests,the game was released in the fall.It added a new character,Sheen,and a new stage that are both based of the CGI cartoon Planet Sheen.
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(Image from Cartoon Crossover Wiki)

If your looking to play the game,it has sadly been removed from Nickelodeon,and it not available on[1]