Magic Winx or just Winx is the first transformation that a fairy wins by believing in herself.
The transformation consists in sparkling tops, shorts, skirts, dresses and full suits with one or two colors and high boots. Also small and flat wings and hair accessories.
In RAI version is just the name of the group made by Bloom and thanks to Faragonda the word that defines the modern fairy.
In 4Kids version means more, is the source of power that a fairy has and that identifies her.
In Nick version appears under the name Magic Winx Charmix and with a new transformation sequence for all girls. However the appearance and the requirement to achieve this transformation are the same as in the original version.