The Knight's Castle, more formerly known as Saru-mon's castle, is the third level in Ape Escape 3. The knight morph can be unlocked at this level. It is placed at a medieval castle that is owned by the king. Several monkeys dressed as guards and princes are seen around. The king is in the top of the castle, but is guarded by a fierce dancing couple in the ballroom. Several guards have to be hit with stun clubs to be captured. The battle with monkey white follows this level on a stony bridge over a pit of lava. Also, the elusive SAL-1000 monkey can be unlocked in a small crevice near the courtyard. You must put it the code first, and then go through the monkey door to fight SAL. The monkey door will be to the right entrance of the courtyard.