Yoku Man is a robot master known for controlling illusions, such as the disappearing yoku blocks that are reoccurring in Mega Man games. Yoku Man can also disappear and reappear at will and create yoku spikes as well. He was designed to oversee mass production of and maintain the efficiency of the blocks. His base is a simulated labyrinth, and he has a love of puzzles and games. He is famous for beating the greatest human minds at chess, with the goal of becoming a chess-master.