Ok I'm a big Christie user but I've been having trouble going higher then a 17-hit combo. Anyone got any advice?

Is it a chain combo?

Yeah, every time I get done with it I either get hit or I press the wrong button and mess up...

I hope your not using the snowfield stage......i'm pretty sure with the "cheat" located there, you can acheive more than a 17-hit combo.

I've only maintained a 9 - 11-hit chain combo with christie.....and it's always guaranteed from a critical hit. :D

No not really, I use the Ice cave most of the time ;)