Boo is a male cat, with white fur. He wears a white hat, with a red feather in it, the only part of him that has any real colour.
While at first, Boo is cute and cuddly. He was surprisingly angry that he was abducted by his own owner, revealing a deep voice when confronting him, followed by violently scratching him. It he seems to like Scooby.
Scooby-Doo! Mystery Incorporated
Scooby-Doo, Jabberjaw, Captain Caveman, and Speed Buggy had solved the mystery and rescued the meddling kids. Scooby unmasked Lord Infernicus and it was Funky Phantom! Funky Phantom was sick of being a sidekick.
Funky Phantom wanted to become the leader and have his own sidekicks. Funky created Lord Infernicus by using a hologram to make himself appear. He used a little smoke, a skeleton puppet, and fireworks to be Lord Infernicus. He than wanted to send all the kids to Africa and even abducted his own cat, Boo. Funky than used the outfits on the guinea pigs just to throw Scooby and the sidekicks off and it was "perfect genius," until Scooby acted like a hero instead of a sidekick. Boo got angry that Funky Phantom lied to him, and retaliated by jumping on him and scratching him.
Boo: You lied to me.
- In the original The Funky Phantom series, Boo did not talk. This is his first speaking role.