Power Suit Samus
From the Super Mario Wiki
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Power Suit Samus is Zero Suit Samus's Final Smash in Super Smash Bros. Brawl. Upon activating her Final Smash, Zero Suit Samus will begin spinning and her armor will begin forming around her, turning her back into her armored form after the transformation. During the transformation, electrical sparks will be emitted from the suit, repeatedly damaging and launching nearby fighters. In Super Smash Bros. for Nintendo 3DS / Wii U, her Final Smash is her Gunship, due to Samus and Zero Suit Samus being separate characters.