Fairy Form/World of Winx

Dreamix
In Season 1, the Winx are initially seen investigating the mysterious kidnappings of talented kids on the ground, but they soon acquire this form and use it combat the evil forces of the Talent Thief more effectively on all terrain. The way of earning Dreamix is only vaguely hinted toward. It seems as though the Winx earned Dreamix during Annabelle's performance, as they experience a vision of the transformation sequence at the same time Annabelle's dream comes true (which never would have happened without their help). Then, the Winx are forced into their Dreamix forms when they are sucked into a portal leading to the World of Dreams. The source of Dreamix power is dreams and talents. It grants the Winx the ability of sensing which talented person will be the next target of the Talent Thief (referred to as "Dreamix Vision"), as well as their whereabouts. Since the Winx were forced into their Dreamix after being sucked into the portal leading to the World of Dreams, it is possible that Dreamix is necessary to enter this place. It allows the girls to search on land, midair, and briefly underwater.

Onyrix
In Season 2, the Spirit of the World of Dreams transports the Winx to the World of Dreams, and they find themselves in their Onyrix form. Onyrix is the evolved form of Dreamix. In order for a fairy to earn Onyrix, she must earn Dreamix first. Then the Spirit of the World of Dreams grants her Onyrix. With Onyrix, fairies are granted the ability to enter the World of Dreams without the use of the Magic Watch from the previous season.