I got Sonic Mega Collection a few months ago. It's not the most-played game in my collection, but it's still really fun. The games haven't been changed at all, and I think they're simple enough for your brother (only use one button). It comes with Sonic the Hedgehog, Sonic 2, Sonic 3, Sonic and Knuckles, Sonic 3d Blast, Sonic Spinball, and Dr. Robotnik's Mean Bean Machine. Plus I think there are more you can unlock. Anyway either this or a 2D Mario game would be good to bring someone into gaming, because they're fun, but not too complicated.