Animes All Stars uses characters created with sprites from Jump Ultimate Stars (JUS) and other works modeled on this style.
Yes, it's look hillarious and you can see such scenes in many Mugen games - but not here. Imagine a fight between Vegeta from Dragon Ball Z Extreme Butoden with Naruto from Naruto Ninja Council. Unfortunately, most of fan-made games are just a package of various characters, whose sprites come from very different other games, so the battles doesn't look good.
The game includes a total of 77 playable characters, which is an impressive number, even if we're talking about Mugen games. If you're a real anime fan you can be sure that this characters roster will give you a lot of excitement. It's an anime crossover game with iconic heroes from many popular series like Dragon Ball, Naruto, One Piece, Bleach, Fairy Tail, and many more. Animes All Stars is a fighting game developed with Mugen engine by Kaioh-SAMA - the creator of Mugen games well known from titles like Dragon Ball Z Battle of Gods and Dragon Ball Super X Katekyo Hitman Reborn Mugen.