Right Arm, referred to as Helletic Hojo Right Arm in the BradyGames guide, is part of the Helletic Hojo boss fight. The arm itself does not attack, but Hojo uses it to attack himself. Once the arm is killed, Hojo can no longer attack with it. Interestingly enough, the Right Arm is not immune to Berserk, but because it does not attack, this causes a glitch where the Right Arm continually tries to use an attack that costs an infinite amount of HP; as a result, the game will repeatedly print the message "Right Arm's skill power is used up".