Metroid: Zero Mission

From SmashWiki, the Super Smash Bros. wiki

Metroid: Zero Mission is an action-adventure video game produced by Nintendo for the Game Boy Advance handheld console. It is part of the Metroid series, an enhanced remake of the original Metroid game designed to retell the story of Samus's original mission.

[edit] In the "Super Smash Bros" series

Main character and Bounty Hunter Samus Aran is playable in all three Super Smash Bros. games and Main enemies, Metroids, will be appearing as Assist Trophies in the Super Smash Bros Brawl.

Most importantly, Zero Suit Samus's look originates from this game; after defeating Mother Brain, Samus loses her Power Suit, and must fight off Space Pirates wearing what is now called her "Zero Suit".