Like the wind, it can slip through any gap, no matter how small. It leaves balls of white fluff behind.
Whimsicott is a small, brown bipedal Pokémon. There is a cotton-like substance covering its back, neck, and forehead. Behind it is a green, star shaped section similar to the area where a plant connects to its produce. It has orange, oval-shaped eyes and green, curled horns or ears. Whimsicott can manipulate its body to pass through cracks, no matter how narrow. Because of this, Whimsicott is a notorious prankster, moving things and leaving cotton balls behind. It also can ride through whirlwinds.
As Mega Whimsicott, its body becomes slightly wider and its cotton becomes more voluminous and is now tinted with light pink coloration and covered with dark pink markings resembling cherry blossoms, while its overall shape now resembles that of a weeping willow. It has two pink blush spots on its cheeks and a pink flower on its forehead. Its horns or ears now curl upwards, are longer in length and are covered in thorns.
Whimsicott is one of two canon Pokémon that received a Mega Evolution in Uranium, the other being Arbok.
Whimsicott is based on the cotton plant. It may also reference sheep, the Vegetable Lamb of Tartary, a mythical plant said to grow sheep, or Saci, a brown-skinned creature from Brazilian folklore that rides the wind and plays pranks.
Whimsicott comes from whimsical or whimsy (an eccentric nature) and cotton.