The Spectral Fiend first shows his power in Level 3 when he survives falling into a pool of spectral energy and simply jumps back out. He can also control some spectral energy to make a portal (in which Spectral Creatures come out). He is defeated after he sends many Spectral Creatures upon Clyde. who defeats them all and gets to a Spectral Fountain and gains his Sonic Boo. Clyde uses his Sonic Boo to knock down the column in which the Spectral Fiend is on. The column hits a siphon and blows up both the siphon and the Spectral Fiend, never to be seen again by the players.