|Voiced by||Alan Oppenheimer|
Mr. Squid attempted to join Prime Evil's Hauntquarters crew but was rejected before he could display any of his powers. Therefore, he decided to capture the Ghostbusters on his own. Posing as 'Mr. Billingsly', he lured the Ghostbusters to the Mansion on the Hill, supposedly as guests of honor at Mrs. Billingsly's surprise party.
Mr. Squid has water based magical powers which he can conjure up by uttering various appropriate spells. He is also able to turn himself in to a squid shaped astral form so he can fly from here to there.