Vinny

Vinny is not an official character in Mushroom Kingdom Fusion 2, but is well-known none the less.

Vinny is the programmer's debug character, used to test levels before they're released to the public domain. He became known to the public due to his being selectable in versions of the game prior to the final one. On the character select screen, his appearance is simply that of a blue Mario and while in game, he takes the form of a palette-swapped version of the character that was previously in use. He can fly, can't get hurt or die in special levels in any way and can jump when falling.