To vanquish him, Fox had to activate a series of volt generators around each square hallway; in order to electrocute the gargantuan carnivore. When the King was toppled over, Fox threw Fuel Barrels at his forehead four times.
The RedEye King, due to his unnatural size, became the tribe's leader and drove them wild and into enemies of the EarthWalker Tribe. The two rival tribes kings waged war on each other for some time, but the RedEye Tribe were defeated though, and imprisoned into the Walled City, locked away with the Sacred RedEye Teeth kept secured by the EarthWalkers. The King was kept in the largest dungeon himself. But during the Saurian civil war, when General Scales and the SharpClaw Tribe captured the city, they set the King and his tribe free. They got their revenge on the EarthWalkers by slaughtering most of them, and trapping the King EarthWalker in the same prison the Redeye King was kept. He then had the city occupied and his tribe stationed there. He kept the final fire spellstone in this dent in his skull, and was kept to guard it, in his former prison. When Fox McCloud and Prince Tricky came to get the spellstone, the deranged King opened the gate and attacked, but Fox was able to use volt generators to stun him, then he threw explosives at him. He did this many times to defeat him. The jolt generated from the stepswitch would then temporarily stun him, leaving him open to attacks. Only then Fox had the chance to damage the King with explosive Fuel Barrels.After completing this procedure four times, the Redeye King collapsed, then Fox attempted to remove the SpellStone. Before Fox could retrieve the SpellStone, the scurrilous tyrant King attempted one final attack, However, Fox, with his keen reflexes, jumped to avoid the King's jaws and then he was successful in piercing the King´s skull with the sharpened segment of Krystal's Staff, therefore killing the tyrant lizard king.