Pierre is a large pink bird owned by Gan Fall.
He consumed the Uma Uma no Mi, a Zoan-type Devil Fruit that allows him to transform into a Pegasus or a full horse.
In his normal form, Pierre is a large pink bird with a red polka dot pattern on his body and horn-like ears. He also has bandages wrapped around his torso.
When in his hybrid bird-horse form, he turns into a horse with wings, retaining his pink body with red polka dots but now with white feathers. His face elongates to resemble that of a horse, making him look like a Pegasus.
Pierre primarily serves as transportation for Gan Fall.
(Source - One Piece Wiki)
