The Wii

You've already got some of the best games already. Super Mario Bros. 2 makes for AMAZING multiplayer experiences. SSBB is good for those multiplayer experiences as well. Animal Crossing is by far one of my favorite game series; it NEVER ends and there is always something to do; that kept me entertained for a LONG time. Boom Blox is freaking amazing, I love that game.

I would suggest to get Excite Truck and Excite Bots. Excite Truck is my all time favorite Wii game. Me and my friend can play for hours on Canada Gold: River Run. Crashing...Dying...Troll inside the bridge (just a hole in the bridge that kills you if you go inside)...Great times. Excite Bots is the sequel and requires a little more interaction, and you get to be little robots instead of cars. Robots range from being a bat to being a squid.

Twilight Princess is also a must-get. If you want more multiplayer experiences that are wacky and fun for everyone, I recommend Wario Ware: Smooth Moves. It's so random and so funny!

My brother actually got Wii Sports Resort today for Christmas; I'd recommend that as well. They have a ton of sports on it, and my favorite so far is Frisbee Golf.

That just reminded me that the Wii has a lot of great games...