The Jurassic Creeps are a gang of mechanical evil dinosaurs and are the archenemies of the Dinobonoids.
- Triceratron - a mutant robot orange Triceratops and is the leader of the Jurassic Creeps and he is the enemy of Professor Gaylord. Voiced by Frank Welker.
- Jurassic Creep #2 - a mutant robotic turquoise Pteranodon without wings and he usually speaks a bit. Voiced by Quinto Flynn.
- Jurassic Creep #3 - a mutant robotic purple Albertosaurus who is one of the shorter members, but still big and he just spoke a little bit. Voiced by Betty White.
- Jurassic Creep #4 - a mutant mechanical red Dryosaurus who likes to destroy things like other villains and he just spoke a little, too. Also voiced by Quinton Flynn.
- There were other Jurassic Creeps that weren't seen as toys and they were seen in the beginning in Toys Will Be Toys. There was a yellow Megalosaurus, a red Coelophysis, and a green Allosaurus (all seen with Triceratron); and a blue Corythosaurus, a teal Deinosuchus, a light yellow Carcharodontosaurus, and a red violet Apatosaurus (all hit by Billy).