Bakugan Battle Brawlers (2007)

Season 2: Episode 21

Mira is uncertain of her brother's intentions while in Gamma City. Meanwhile, Ace is unconvinced that Mira has betrayed them due to his feelings for her, but they all resolve to head to Gamma City for the final controller. That night, Spectra invites Mira to dinner where he asks her to join him because he needs her and cannot accomplish his goal without her. Mira is unsure and retires for the night. Later she contacts Spectra asking to battle him and let that decide her fate: if she loses, she will serve him but if she wins, he must go back to being her brother. However, after Helios has volunteered to become a cyborg bakugan after Prof. Clay had collected data on Drago while he was in Spectra's possession. Wilda and Baliton prove to be no match for Cyborg Helios and Mira loses.