He is a Tosa dog that guards a duck pond. He attacks Sasuke when he's trying to steal a duck, but is stoped by Weed and later GB. Weed tears guard dog's ear with the Battouga, but that only made the guard dog more furious. He's about to attack Weed when he sees Smith up the hill. He gets so terrified that he gives up the fight and hides in his doghouse.

He is known in fandom as "Banken", but it's not a name. "Banken" means a guard dog, his real name is unknown.