I'm having problems with the Extra Mission, Cait Versus the World. It's the one where you play as Cait Sith and you have to defeat 100 enemies. I have tried this mission serveral times, and I've only been able to get up to an average of 35 enemies. Cait Sith's attacks really wear on the nerves, but what I find annoying is the fact that Cait goes into a song and dance every time he gets hit. This is particularly bad when he's surrounded, because as soon as he stands up, he gets killed.

Can anybody help me get through this one?