Here's a link to a 4-player GameCube fighting game similar to Power Stone on the Dreamcast. I've had it for a number of years and the game is a blast to play, especially at parties! Now I'm auctioning it off on eBay.
Rave: The Groove Adventure is now difficult to find.
Import stores sold out years ago.
If you are interested in importing games, Rave: The Groove Adventure is a great place to start. Most of the game is in English. You can also find a helpful translation for the rest of it here, although I never used it (Picking up a large red orb with a lighting bolt symbol in it means your opponent is gonna get screwed no matter what language you speak.
). If you need help playing import games, check out this guide to mod your cube or just pick up FreeLoader to play any import games on your system without modding.