Wario Land 3 - Forest of Fear (Green Chest)

Go to the same area where you find a Spearhead in the tightrope by Blue Birds and turn into a vampire by Kobats. A bag wall will return you to normal. Cross the top with a Spearhead without distraction from bats and throw the enemy at blocks to pick up the Green Key. Go to where you first got turned into a vampire then open the Green Chest. This chest contains a Warp Removal Apparatus. This item will deactivate the warp circles in The Warped Void.