How do I get the 7th castle secret star (invisibility cap)?
  • 1 of 9: The place leading to the level where you can activate the invisibility caps is in the basement.
  • 2 of 9: There is a wooden door which you can walk to without jumping onto any platforms or climbing and it's to the right of the fiery painting.
  • 3 of 9: Inside is a pool with two towers emerging from it.
  • 4 of 9: Get on top of each tower and stomp on them.
  • 5 of 9: The water will drain from the pool and the door that was underwater is now accessible.
  • 6 of 9: This door leads to the moat area outside the castle which is now accessible.
  • 7 of 9: There is a hole where the moat used to be.  Jump in.
  • 8 of 9: On the level you transport to find the blue switch for the blue "!" boxes that will activate invisibility caps in all levels you're allowed to get them on.
  • 9 of 9: You can also get a secret star if you collect all eight red stars on this level.