​Pennywise was a mysterious and extremely evil being hailing from an unknown realm/dimension outside the regions of our universe. When he arrived on Earth to feed himself, in time his favorite disguise turned out to be that of a colorful and fascinating circus clown named "Pennywise". It also had the ability to transform into any other being or thing that pleased the victim, usually based on their loved ones or friends to lure them into different traps. Or it could simply morph into the victim's worst fears and nightmares.