Bucky O'Hare Widget the World Watcher The Care Bears Autobots Optimus Prime Isaac Matthew Star-Lord Rocket Raccoon Drax the Destroyer Gamora Groot The Power Rangers Voltron Goku Twilight Sparkle Mrs. Brisby Mappy Alvin Seville Captain Planet International Rescue Captain Scarlet Fievel Mousekewitz The Kangaroo Brothers (sometimes)
Gregory is the owner of Gregory House, accompanied by his annoying young grandson, James. Gregory is a bit crazy as he keeps the Powerpuff Girls, Autobots, the Avengers and other heroes trapped inside his hotel.