Fantendo Ultimate Showdown is a game similar to the Super Smash Bros. series. You are free to add your own characters. To the point, the game is about fighting it out with everyone's favorite Fantendo and Nintendo characters in a all out brawl. The game includes many stages, tons of cool characters, and a story mode where players battle character after character in a story-like manner.
Nintendo decided one day that it was not good enough to only have Nintendo characters, why not have fan made characters to? So Nintendo searched and searched till they found Fantendo, and found out people made fan characters on it. Why don't we include these guys in a game? So they did, and thus Fantendo Ultimate Showdown was born.