When the crew of the Moonlight SY-3 destroyed the device the Kilaaks were using to control Earth's monsters, Godzilla and his fellow monsters assembled near the Kilaaks' base at Mount Fuji, preparing to assault it. The Kilaaks proceeded to unleash their trump card, King Ghidorah, to defend their base.
King Ghidorah descended and attacked the Earth monsters, managing to hold his own against several opponents. Anguirus bit down on King Ghidorah's neck, causing him to take flight and send Anguirus falling to the Earth. King Ghidorah landed and stomped Anguirus into the dust, then reentered battle against Godzilla and his allies. Anguirus, undeterred, got back up and attacked King Ghidorah again. As King Ghidorah battled Godzilla and his allies, Gorosaurus landed a devastating kangaroo-kick on his back, knocking him to the ground. Godzilla proceeded to stomp on King Ghidorah's necks, causing him to cough up blood. Minilla fired a smoke ring that choked King Ghidorah's remaining head and caused it to fall limp to the ground.