To use as prop - "(Tezuka's) wife is very quiet normally, but one day she exploded, maddened by all the time he spent at work. In the game, there is now a character who shrinks when Mario looks at it, but when Mario turns away, it will grow large and menacing." –Shigeru Miyamoto, on how co-creator Tekashi Tekuza inserted his wife into Super Mario 64; Nintendo Power
Everyone's favorite ghost has escaped the haunted mansion, but fear not because he's one of the good guys now! Upon entering a dark room, the Super Mario motion sensor Boo lamp begins to shine and emits a pleasant glow that's anything but scary.