Beta Ray Bill

Beta Ray Bill was an alien from a race called the Korbinites. He temporarily possessed the powers of Thor's hammer Mjolnir and became an alien version of Thor. After his heroic deeds Odin gave him his own hammer, Stormbreaker and he fought alongside Thor against villains.

Planet Hulk
Beta Ray Bill is seen in a flashback where he fought alongside Thor against the Stone Men when they invaded Earth. He is later seen fighting Hulk in the gladiator games on Sakaar, and is defeated by him. Hulk destroyed the device on his chest that influenced him to fight in the gladiator games which freed him from the Red King's control.