The term "Ultra Beast" refers to a group of powerful and mysterious Pokémon introduced in the Pokémon series, specifically in the Pokémon Sun and Pokémon Moon games. These creatures originate from another dimension known as the Ultra Dimension and are characterized by their unique designs and abilities. Each Ultra Beast has a specific code name, such as Nihilego and Kartana, and they often exhibit traits that set them apart from traditional Pokémon. Ultra Beasts are typically encountered during special events or in specific locations within the games. They are known for their high base stats and can be challenging to capture. Players often seek out Ultra Beasts for their strength in battles and their role in the overarching storyline involving the Ultra Wormholes and the Ultra Recon Squad.