Mario can't stand not being in a Nintendo game, can he? He's been in both Zelda 3 and Zelda : Ocarina of Time and now the turn has come to Majora's Mask...
   All you have to do to get a glimpse of the plumbers red cap is to look at the Salesman's mask bag (located inside the Clock Tower). On the top of the bag you should be able to see a 'Mario Mask'. There is no known way of gaining access to this mask however, but maybe... just maybe... there is such a cheat. Hold you thumbs. ^_^