I recently bought New Super Mario Bros. Wii.
It's tough, like really, really difficult. I thought about buying it for my best friend's son (he's 8 ), until I actually played it.
Remember how awesome Super Mario Bros. 3 was? Remember how Super Mario World took it even further into awesomeness than was thought possible? Yeah, this game's not like that.
It's fun, sure, but doesn't even come close to the masterpieces that are mentioned above. 2 Players at the same time is frustrating, so I don't even want to imagine it with 3 or 4.
>NSMB DS
<SMB3/SMW
E^D