To Kill Metro Man.
The Mega-Megamind is a robot that appeared in Megamind: The Button of Doom. Megamind built it when he was still a villain and programmed it to have his same personality. It was activated when Megamind pressed a red button that Minion found after the yard sale. The Mega-Megamind mistook Megamind for Metro Man due to his new white suit and attempted to kill him. Megamind destroyed it with the Death Ray.