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MarioMario54321 is an American YouTuber and Super Mario 64 Machinimist. He is well known for his Super Mario 64 Bloopers, his adventure themed films and inspiring SuperMarioGlitchy4, a fellow machinimist. Like SMG4, MM54321 is known to put himself and his fans in video as pallet swaps of Mario, a common trait among SM64 machinimist.