The Karateloid (カラテロイド, Karateroido) is a Messianic Metaloid that is created when Messiah Card 03 infects a karate fist guard. It is sent to investigate human instincts to report back to the rebuilt Messiah. Its left leg has the power of Messiah in it, enabling it to move its leg faster than can be seen by the naked eye. It seeks out the child Kenta for its studies on instincts.