To do this cheat you must have the gravity boots.In the right-side-up castle there is a room under the librarian's room. In this room there is a hole in the ceiling. If you gravity jump up it you push the librarians chair up.You have to keep gravity jumping under him, but you must give time between jumps. (I suggest you gravity jump after you fall back under the ceiling, before you hit the ground.) Keep doing this, though it may take a long while, you will get the axelord armor as well as dracula's tunic, and other items too.

Note: You cannot hit the ground when gravity jumping continuously.