fun after getting all the customization parts, and once you get decently good at it
Story Mode: way too short, and really it pretty much sucks, besides the funny cheesy dialogue, especially ur best friend Harry trying to hit up every girl he sees.
The Grand Battle: this is the main part of the game in my opinion. You fight in tournaments, 5 or 6 people in each u hav to fight, and ur ranked on how much health and time u hav left, and a few other factors, and at the end u can get a bronze silver or gold trophy. The point of course is to get all gold trophies, and this is fairly challenging the first time you play through it, but after that its pretty easy once u figure out that all u hav to do is get a good gun and keep jamming the B button. But the fun part is looking at ur opponents robo, and then choosing what combinations u should choose to most easily defeat it.
Multiplayer: fun, you can play against computers in it with different types, but computers always get pretty tiring, but its really fun if you can play it with friends.
Even though its short, it grows on you after playing it through and getting the hang of things, and if you have a friend to play multiplayer with, then its a pretty awesome game.