Luigi's Mansion, Shadow The Hedgehog, and Star Fox: Assault
Luigi's Mansion is awesome.
Shadow The Hedgehog, I don't know what the fuck is going on. I've only played the classic Sonic games with Sonic, Tails, and Knuckles, so when I saw all these new characters I thought "who are these idiots".
Star Fox: Assault is pretty good, but not the best in the series. At least it's not like Adventures, where you have to run back and forth to find some item and then try to get through some impossible area. I wasn't able to get past the tug-of-war game with that guy without a turbo controller (I apparently couldn't press A fast enough, and I've never had any problem with pushing buttons rapidly to do something in any other game). Then a little ways before fighting Andros I just gave up.