Slime Lord;168865
That's cool. Little homages like that add to the authentic GB experience for me, just seeing the nods to everything done before. I think having some of the older GB games as unlockable bonus content would've been cool but I'm sure legal issues make that next to impossible.
Yeah, I was even told that it wouldn't be a good idea to put the credits for the first game in there since that was an Activision game, but I did it anyways.