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 * Super Smash Bros. (pictured) is the only game in the Super Smash Bros. series to receive an ESRB rating of E for Everyone. Its successors are both rated T for Teen.
 * World Flower is the only world in Super Mario 3D World that doesn't have a Captain Toad level or a Mystery House.
 * Macho Grubba and Sir Grodus are the only bosses in Paper Mario: The Thousand Year Door who show signs of being worn out in battle.
 * Electrodrome is the only track in the Mario Kart series with a one-word name in English.