Notes:

According to Supper Mario Broth, where this came from:

"In Mario Party 7, a dummied-out debug mode containing a movement test room can still be accessed by modifying addresses in the game’s memory. Within the test room, if Luigi is present, his model will deform when the room is exited. This happens only to Luigi and not to any of the other 11 characters."

(If this isn't the appropriate gallery for this image, then feel free to move it.)