Original: These colors are seen again in Metroid Prime and Metroid Fusion. Also in the Metroid Prime series, the eponymous Metroid Prime creature fuses with the remnants of Samus's Phazon Suit to become Dark Samus, an evil doppelgÃ nger of Samus.
Simplified: In Metroid Prime 2: Echoes, Samus meets a creature called Dark Samus, which is Metroid Prime fused with a suit Samus got on Tallon IV.