Spooky, the Hungry Guard Dog is a four-year old bulldog portrait ghost appearing in the game Luigi's Mansion. It is known to bite any seemingly edible thing in sight. Like the other portrait ghosts, Spooky is released by King Boo after the capture of Boolossus. Its portrait number in Professor E. Gadd's gallery is 13.
Spooky resides in the Boneyard in the mansion's backyard, where it rests in a doghouse. When Luigi approaches Spooky, the dog spots him and begins to chase him around the Boneyard, attempting to bite him each time after barking. If it does, Spooky won't let go of Luigi's rump until it is shaken off. After Spooky barks four times, an annoyed Mr. Bones appears. He complains about the noise and then attacks Luigi. Capturing Mr. Bones leaves a bone in the ground. Spooky stops chasing Luigi to lick the bone, causing it to let its guard down. In this state, Spooky is vulnerable and can be vacuumed by the Poltergust 3000. After struggling, Spooky is eventually captured, which causes a vortex leading to the Graveyard to appear in its doghouse.
Spooky is a lavender bulldog ghost with only its two paws in front and a ghostly tail at the back. It sports tiny, pale blue eyes, a purplish black nose, droopy ears, and four large fangs in its massive lower jaw. It wears a red spiked collar around its neck.
Strangely, Spooky does not have legs.
Spooky is the first portrait ghost to not be based off a human.
In the study, Spooky appears to be portrayed as he was in life.
One of the paintings in the Study is a picture of a bulldog. The picture may represent Spooky when it was alive.