Yella

Appearance
It is yellow-colored. A lighter shade of yellow is on its body and under its tail, whereas a darker shade of yellow is on the rest of him. It is in the shape of a Non-Sapient Being.

Powers/Abilities
Like its prey, it can release a loud shriek that only dogs and Sonorsians can hear, this being at the quietest sound (other than footsteps and related things). It is very durable and can make a cave out of a mountain. It can survive in space. Although it can`t time travel, it was seen coming out of a dimensional wormhole attacking the two Ben`s and Rook.

Weaknesses
It is weak when it`s attacked in space.