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A Game Boy test cartridge used internally at Nintendo to diagnose problems with the hardware contains a graphics test that consists of ten Raccoon Marios marching around a monolith in a manner resembling a ceremony or ritual.
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In Donkey Kong Country, Diddy Kong's "minigame loss" animation is him stomping on his hat. In the Tanked Up Trouble level, it is possible to cause it to play while next to a ledge, resulting in Diddy throwing his hat into the abyss and jumping in after it, dying in the process.
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Unused, corrupted animation for Bowser found in the data of Super Mario 64.
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