Based on the Beast from Iron Maiden, he is just like Chef Pig, but red, with web-like ears, a pointy devil tail, red horns, light snout and sharp teeth. He often comes with a red trident.
In the game, he appeared in the tournament as a boss. He was hard-to-defeat like other boss pigs, but Terence or Bomb could defeat him easily, there was also runes that would launch a lightning bolt on him when all of them were activated. He had three injury states and when he was defeated his organs and eyes would fall.
Wizpig from Angry Birds Epic in his demonic form: Demonic Wizpig, looks similar with Beast Pig. His only differences were that Demonic Wizpig has a dark cloud below him, a wizard's hat on his head, and his weapon is a hook.