What happens when a pure Flying-type Pokemon uses Roost?

Question

Would it have no type? Or will it keep it's Flying type in this case?

Answer 1

It would become ??? type, or it would become normal type, depending on which generation.

Generation IV

If a Pokémon that has become a pure Flying-type uses Roost, it will become a ???-type Pokémon until the end of the turn.

Generation V

If a pure Flying-type Pokémon uses Roost, it will become Normal-type until the end of the turn.

-Bulbapedia, Roost

Comments

Thanks WT :)

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You're welcome, Fizz

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About Generation 4, it's funny because until Tornadus, there was no pure flying type :)

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well there was arceus-flying though it for some reason couldnt learn it

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Well there you go, Arceus. Grand Master PokeGod. Who can't learn roost xD

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There is a way however. If a Color Change is Skill Swapped onto a Smeargle, for example, and then hit by a Flying move, it was become a Flying type. If Smeargle moves second and uses Roost, the effect would be triggered.

Answer 2

If a pure Flying-type Pokémon uses Roost, it will become Normal-type until the end of the turn.

Source

Comments

Thanks Mew :)