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The Zero Suit is when samus is not in her power suit, her "Zero Suit" is usually a tight-fitting blue jumpsuit. Samus' Zero Suit is only seen in 3 instances: -in Metroid Zero Mission after you defeat mother brain, escape, and crash land near the pirate mothership. -When you die in a 2-D Metroid game, normally, Samus' suit flashes, then shatters, revealing her "Zero Suit" -In Metroid Zero Mission, you can enter cheat codes to modify samus' appearance, many of these codes will show samus without her power suit.