Green Knights are enemies seen only in the Haunted Castle. They behave aggressively when the Spelunker is seen, charging at them to deal damage. They will run off ledges and do not stop charging until they take damage. Due to the armor they wear, they cannot jump but are immune to damage from being whipped and stomped (unless the Spike Shoes are worn), so the best way of dealing with them is to throw at them or use . When they take damage, the suit of armor breaks to reveal an ordinary Caveman, with two hit points remaining.