Legendary trio

A legendary trio is a term used to describe a group of three closely-related legendary Pokémon. So far, this has described six groups of Pokémon: Kanto's legendary birds, Johto's legendary beasts, Hoenn's legendary golems and weather trio, and Sinnoh's dragon trio and lake trio.

Legendary trios can be subdivided into two tiers, normal trios and mascot trios. Normal trios, which are always the first legendaries that appear in any Pokédex order, are allowed into the Battle Tower and other battle facilities. They are also the only Pokémon whose base stats total to 580. The mascot trios, whose name comes from the fact that all of them are version mascots, are not allowed in the Battle Tower, and are found close to the end of the Pokédex in the generation of their release. Many trios, in addition to sharing at least one type, will far more commonly share their ability.

Though far less common, some Pokémon appear in legendary duos, such as Mewtwo and Mew, Lugia and Ho-Oh, and Latios and Latias. Due to their being one short of the now-standard trio, many theories have involved a hypothetical third member of these duos.

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