In episode 49, Riley uses this card during his Duel against Tate. He activates this card's effect by detaching an Overlay Unit to increase its ATK by half of the combined DEF of all EARTH monsters on the field. As the combined total DEF is 4000, this card gains 2000 ATK ("Rock Armor": 2500 → 4500/2000). It attacks "Performachine Gadget Giant", but Tate activates "Gadget Giant"'s effect, which would destroy any Special Summoned monster that battles with it. However, the effect of this card negates the effects of EARTH monsters that it battles. The attack continues, destroying "Gadget Giant", and winning Riley the Duel.