The only true enemy of the game is a mysterious apparition resembling Princess Peach that appears throughout the game, most notably during a chase sequence in the initial forest. A Rex appears earlier in the forest, which is quickly taken away by the entity. A couple more Rexes are found during the ghost Peach chase and a group of Rexes appear in Peach's version of the forest; all Rexes are harmless, but killing all the Rexes in Peach's section will allow the player to reach the hidden treehouse