Knuckle Joe is a helper that can be released from the Assist Trophy item. When summoned, he uses his "Vulcan Jab" technique, which is a series of rapid punches, on the nearest foe. Afterwards, he finishes the opponent off with one of two attacks: The strong, short-ranged "Smash Punch", or the electricity-charged uppercut known as the "Rising Break" technique. Which finisher he uses is chosen at random.