Uma Uma no Mi

The Uma Uma no Mi allows the user to transform into a horse. "Uma" is Japanese for "horse". In the Viz Manga and FUNimation dub, it is called the Horse-Horse Fruit. It was eaten by Gan Fall's bird, Pierre.

Strengths and Weaknesses
This fruit allows the eater to transform into a horse or horse hybrid at will.

This fruit doesn't seem to have any specific weaknesses, aside the standard Devil Fruit weaknesses.

Usage
The main usage of the Devil Fruit is Gan Fall to claim that he has a Pegasus with Pierre, when in reality the original bird form is more than big enough to transport him wherever he goes.