The Cartwheel is a move used by Bonker in the first ClayFighter. This is a charge attack, meaning that you have to hold a directional button back, then press the opposite of that directional button and the button that requires the attack to work (along with the strength of the button). In this case, you have to hold back for at least two seconds, then press forward and kick (any strength will do) to use the attack.
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