It is the last trial in Joshua's dungeon. Joshua explains in his message that the Evil Monster is tied up in the chamber, but apparently he broke free. According to Joshua, he's "pretty evil. You're going to have a crazy time trying to defeat him!" The Evil Monster's fingers pull Joshua into the dungeon with him while Joshua is recording his message. The Evil Monster seems to be invulnerable except by being stabbed in his eye. He laughs hysterically while attacking, much of which appears to be toying with Finn. Evil Monster is defeated when Finn stabs him in the eye with his newly acquired Demon Sword and throws the Evil Monster into the large hole at the center of the chamber. It is unknown if it was killed or defeated.