Blue Apple is a kind of apple found in the Overthere Stair. Blue Apples grow in trees and can be knocked down by Cudge or Thudley. The Blue Apple can be fed to Princess Peach when she is asleep, but it does not wake her up. Instead, Peach temporarily shrinks to a tiny size, and then goes back to normal. The Blue Apple restores five HP and cures poison when eaten, and also can be cooked by Saffron or Dyliss to make Sky Juice.