Hoopa is a Mythical Pokémon from the Pokémon series, first appearing in the Pocket Monsters XY era. It is known for its ring-shaped golden horns and the ability to summon portals that can transport people and Pokémon across great distances. Hoopa plays a special role in the series as a powerful, mysterious being tied to legendary events and interdimensional travel. It is often portrayed as mischievous and enigmatic, with both Confined and Unbound forms highlighting its importance in major storylines.