Related: 'SpongeBob SquarePants:' 19 Celebrities You Might Not Have Known Voiced Characters on the Show ... championing the sisterhood of Sandy, Mrs. Puff, Pearl and Karen.

With Update 12, SpongeBob Tower Defense added a new Challenge map called Mrs. Puff’s Boating School ... That way, you will be able to upgrade your characters at a much faster rate than usual ...