The Memory Erasure Device in Custom Robo (GameCube) is a piece of technology hidden within your father’s watch. It has the ability to erase Rahu’s genetic memory, preventing Rahu from gaining more power. It only operates properly when activated by a chip that Sergei has. During the Grand Battles the Police Squad decides to use it on all of the members of the Z Syndicate exepct Sergei. When they meet the hero during the Grand Battles, they have no memory of him or Rahu.