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 * If Hotel Mario is played on January 1st, the game will say "Happy New Year" when starting a game file.
 * According to the Mario Kart 64 instruction book, Koopa Troopa is not playable in said game because Wario stole his kart.
 * Mario & Luigi: Bowser's Inside Story is the first game to include at least 2 optional bosses stronger than the final boss.