Block Buster is the Omnitrix's sample of a Segmentasapien from the planet Polyominus.
| name = Block Buster | backcolor = green | textcolor = black | species = Segmentasapien | home planet = Polyominus | body = Legos | power = Shapeshifting | voice = Nathan Kress | 1st-appearance = And Then There Were Ten (Chris 10)He looks like Bloxx, but he has green instead of blue. He wears the Omnitrix on his left wrist. He also has red and yellow spikes going down his back, starting from his head. He also has black fingerless gloves, like Four Arms. He also wears a green belt with white stripes and black shorts.
He can shapeshift himself into anything, like a catapult, a cage, even a pigeon.
He can be taken apart, but not easily. He can also be broken up, and he can't lift heavy things, like the Eiffel Tower.
- And Then There Were Ten (Chris 10) (first appearance)
- He is based off of Bloxx (duh)
- He is Chris' favorite alien.