The progression system is great and addictive, but it falls flat on its face with the silly story, wonky mechanics and how hard it is to get new moves after the initial spike. A fun spin-off but nothing for the history books.
They made this game so that I would see it in a Walmart when I was like six and go "Sonic!" and then get stuck on it for years and it still ends up my favorite Sonic game. Or one of them.
speaking only from the FIGHTING portion of this game, it's got depth for being a 3d fighting game on the fuckin gba of all things. the story mode however, is boring and quickly gets annoying.