Peg

Peg is Bloom's pet horse that she receives from her parents (Oritel and Marion) as a gift in "Winx Club 3D: Magical Adventure".

Winx Club 3D: Magical Adventure
After Bloom meets Sky in Domino, Sky taught Bloom how to ride Peg.

Peg helped Bloom during the Movie. And at the end of the Movie, she transforms into a Winged Unicorn by eating the seedling on Havram.

Appearance
At first Peg was a normal horse with a blond mane, glowing hair, and greeny-blue eyes. After eating leaves from the Tree of Life she transforms into a winged unicorn.

Abilities
Peg is a skilled horse able run as fast as a bullet. After becoming a unicorn she was able to fly with her wings.It´s possible she may be able to control the transformation,as it dissapeared when the magic pollen was gone and then reapeared after magic was restored, just like with the winx Believix.Other possibilitie is that this was a temporary estate because of magic absence and that her new form is permanent,