Cyber Peacock, known as Cyber Kujacker (サイバー・クジャッカー?) in Japan, is a digitized peacock-based Maverick in Mega Man X4. He was originally an AI that protected the network from hackers before he was corrupted by Sigma. He then begins corrupting the network himself, to draw the Maverick Hunters attention. Like Split Mushroom, Peacock was given the task of testing X and Zero's abilities, putting them through a series of trials and training exercises.