Two siblings draw video game-related stuff

This is a ballpoint pen drawing that me and my little brother Erole ( funkygrooveforreal.tumblr.com/ ) spent one afternoon working on last weekend.
This is actually the bottom side of a small box that he'd just decided to recycle into a Gameboy/Gameboy Advance loose games storage. At first he was decorating it on his own, then he asked me to draw an angry Toad on the backside. He then requested a Wario which we ended up working on together, and… Well, as for the rest, we pretty much got carried away.

The deal was for him to post the picture on his tumblr, from which I'd get it and put it here. It's now done.
That was a fun afternoon. XD