Please upload a picture of Groundshaker being used in game.
Groundshaker (アースシェイカー, Āsu Sheikā?, lit. "Earth Shaker") is a technique that appears in Kingdom Hearts II. It allows the user to damage surrounding enemies with an earth-shaking battle cry.
In Kingdom Hearts II, Groundshaker is an action ability exclusive to Simba. It costs 2 AP to equip and 10 MP to use.