Sancho the Dog Eater is a huge and dangerous boar. He tends to attack dogs and eat their brains. He has killed many friends of Rocket and is generally very feared even by bears.

Ginga Densetsu Weed

He moves with two smaller followers called Butcho and Matcho in the Wakayama Prefecture. He claims the hot spring area to be his, though it belongs to the Koga dogs according to Tesshin.

He is angered to find Ohu dogs in his bathing place and decides to kill and eat them. He manages to kill Jirō, a reckless minion of Kyōshirō before Weed shows up and kills him with his first (second in the anime) Zetsu Tenrō Battōga.

Sancho's skull breaks and he falls dead into the water. His minions flee the scene in fear.