What does the Quiet nature do?

Quiet raises Sp. Atk by 10% and lowers Speed by 10%.

What stat does Quiet increase?

Quiet increases Sp. Atk by 10% and decreases Speed by 10%. HP is unaffected.

A Quiet Pokémon likes Dry flavors (tied to Sp. Atk) and dislikes Sweet flavors (tied to Speed).

Yes. Use a Quiet Mint to apply the Quiet stat effect to any Pokémon without changing its displayed nature.

Nature

Raises Sp. Atk, lowers Speed.

Raises Sp. Atk +10%

Lowers Speed −10%

LikesDry

DislikesSweet

Slow special attackers, Trick Room special sweepers.

Modest −Attack Mild −Defense Rash −Sp. Def

What does the Quiet nature do?: Quiet raises Sp. Atk by 10% and lowers Speed by 10%.
What stat does Quiet increase?: Quiet increases Sp. Atk by 10% and decreases Speed by 10%. HP is unaffected.
What flavor does a Quiet Pokémon like?: A Quiet Pokémon likes Dry flavors (tied to Sp. Atk) and dislikes Sweet flavors (tied to Speed).
Can I change a Pokémon to Quiet?: Yes. Use a Quiet Mint to apply the Quiet stat effect to any Pokémon without changing its displayed nature.