Keldeo is a fictional character from the Pokémon series, specifically a Legendary Pokémon in the Pocket Monsters universe. Known for its unique ability to change forms between Ordinary and Resolute, Keldeo is a Water/Fighting-type Pokémon that is part of the Swords of Justice, a group of four Legendary Pokémon. Keldeo's role in the series is that of a protector, often depicted as training to become stronger and learning from its companions, Cobalion, Terrakion, and Virizion. Its youthful determination and courage make it a beloved character among fans.