Cottonee (Japanese: モンメン Monmen) is a dual-type Grass/Fairy Pokémon introduced in Generation V. Prior to Generation VI, it was a pure Grass-type Pokémon. It evolves into Whimsicott when exposed to a Sun Stone.

What Stone evolves Cottonee?

9 How to Evolve

Once you've found and captured a Cottonee, you'll need to evolve it. This can be done by exposing it to a Sun Stone. Near the arched rocks in the Dusty Bowl, you can spot small sparkling spots that indicate a hidden item. These can be Sun Stones if you're lucky.

How do you evolve Whimsicott?

Whimsicott is a dual-type Grass/Fairy Pokémon. It evolves from Cottonee when exposed to a Sun Stone. It can Mega Evolve into Mega Whimsicott using the Whimsicottite.