Elfun

Black +2: Like the wind, it can slip through any gap, no matter how small. It leaves balls of white fluff behind.

White: Riding whirlwinds, they appear. These Pokémon sneak through gaps into houses and cause all sorts of mischief.

Black 2 +3: They appear along with whirlwinds. They pull pranks, such as moving furniture and leaving balls of cotton in homes.

Sun: It rides on the wind and slips into people’s homes. After it has turned a room into a cotton- filled mess, it giggles to itself and takes off.

Moon: This Pokémon appears, riding upon the wind. But if the wind gusts up, it’ll blow the cotton on this Pokémon’s head clean off.

Ultra Sun: This nuisance sneaks into people’s homes, where it hides important things and scatters cotton all over the place.

Ultra Moon: Whimsicott doesn’t live in a fixed location. It floats around on whirling winds, appearing all over the place to perform its mischief.

Sword: It scatters cotton all over the place as a prank. If it gets wet, it’ll become too heavy to move and have no choice but to answer for its mischief.

Shield: As long as this Pokémon bathes in sunlight, its cotton keeps growing. If too much cotton fluff builds up, Whimsicott tears it off and scatters it.