I don't know why, but this question popped up into my mind today. Has Mario ever appeared on Non-Nintendo systems? The only instance I could think of was Donkey Kong being released on one of the pre 8-bit systems, the Atari Something. I vaguely remember Mario was supposed to be a hidden character in some basketball game a few years back but I wasn't certain if that game was a mutli-system game or not. I'd also be very interested in any would-be Marios that appear -- you know, Marios that are different enough from the copyright that they can get snuck into games. If there are any.