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Mr. Saturns are alien-like creatures from the EarthBound/Mother series. In both games they reside in a location called "Saturn Valley", and speak their own language.
In the Super Smash Bros. series, beginning with Super Smash Bros. Melee, Mr. Saturns appear as weak tossable items. While they normally walk around on the stage, they can be picked up and thrown at another player for minor damage. However, they deal a great amount of shield damage; in Super Smash Bros. for Nintendo 3DS / Wii U, a thrown Mr. Saturn can instantly break another player's shield. Peach, when doing her Vegetable move, has a small chance of pulling up a Mr. Saturn instead of a vegetable. In the Onett mission of Adventure Mode in Super Smash Bros. Melee, Mr. Saturns are the only items that appear.
In Super Mario Maker, a Mr. Saturn can be unlocked as a Mystery Mushroom costume, via the Event Course Welcome to Saturn Valley. Their appearance is based on the original Mr. Saturn sprites from EarthBound.
Super Smash Bros. Melee
Super Smash Bros. Brawl
Super Smash Bros. for Nintendo 3DS / Wii U
Name in other languages