Had to do a quick google search to discover that you were talking about Paper Mario: The Thousand Year Door.

Never played any of the Paper Mario games. Not too big of a fan of the turned based RPG (it is turn based, right?). I really liked Super Mario RPG for the SNES. It was really cool seeing a fleshed out fantasy world in the Mario universe. Even though I don't like turn based RPGs, I still found SMRPG well worth playing. I would have really liked to see a sequel that followed more closely in its footsteps. Paper Mario just didn't do it for me. The visuals were one of the things I found most interesting about SMRPG.

Really annoyed that SMRPG doesn't work with any of the SNES emulators on the DS. If they released an official DS port, I'd definitely buy it.