MegaMan NT Warrior - Season 5 Episode 5 Zero's True Character
Overview: Professor sends a pack of viruses after Lan. Meanwhile, Chaud also appears in the factory to aid Lan, but Zero intervenes. Chaud battles with CrossFusion and fails, but Chaud's bond with his NetNavi sparks a change of heart in Zero. Refusing to be a pawn of Professor anymore, Zero departs to live his own life.