1. Mario Galaxy
2. SSBB
3. Mario Galaxy 2
4. Zack and Wiki
5. No More Heroes
6. Tatsunuko Vs Capcom
Thats about it for me, cant think of any other good games which isn't on other platforms. Metroid Prime 3 would have been on list if it wasn't for the awful control.
Edit. Forgot that No More Heroes is on other consoles as well.