Ichirou, you'd probably love the Gundam game, actually. It's exclusive too.
This is what I own for Wii now:
-Zelda Twilight Princess (GC port)
-Odoru Made In Wario
-Wii Sports
-Hajimete No Wii
-Guilty Gear XX Accent Core (PS2 port)
-Biohazard 4 Wii Edition (GC/PS2 port)
-Mario Strikers Charged
-Swing Golf Pangya! (PC port)
-Excite Truck
-SSX Blur (Essentially a remix)
-Mobile Suit Gundam
That's not a bad line-up, really. It's just that when it's all said and done, I'm playing the other systems over this one. DS gets my Nintendo time. Wii doesn't suck, but it's nothing more than a Game Cube "extension" that I think will get old and tired among many players within a year or two. I don't think it has the legs to be a long-lasting system, quite frankly.