Doopy (from The Adventures of Taylor Smith Show) is the second member of The Ben 10 Alliance squad, one of the allies of Team Isberto. He is a ghost-like creature who is one of the friends of Taylor Smith. Doopy is very happy, hyperactive, and friendly, often acting very silly or eccentric at times. He often likes to throw an endless party with his friends. He enjoys playing planks, sometimes the best thing that Doopy did was to throw pies on someone, but not on his friends. In spite of this, Doopy is the unstoppable prankster of the world. He also enjoys making an endless fireworks, especially for using them in the night of the endless party.
- Doopy is the resemblance of Doopliss from Paper Mario: The Thousand-Year Door.