Believix

Believix is a transformation the Winx achieved in Season 4. It is the transformation after Enchantix, but it is said not to be the final form. Believix is a higher level fairy form which can be accessed by Enchantix Fairies, but it was never mentioned by her that it was the Final Fairy Form, but only one of many other Higher Level Fairy Forms.

Requirements
For a Fairy to earn her Believix form, she has to make people believe in fairies and magic, thus Believix can only be earned on Earth or somewhere where people do not believe in magic. Believix gets stronger when more people believe in magic, which means that if a fairy does not convince people to believe in fairies and magic, her powers will weaken

The fairy also have to gain Enchantix power in order to get Believix transformation.

The Believix comes with four types of wings: the normal wings, and then the fairy has Speedix, Zoomix and Tracix wings.

The Winx Club earn their Believix in A Fairy in danger because Roxy believes in them.

Appearance
The fairies clothing is more casual themed in this form than other forms. The fact that it looks this way could be since they obtained this form on Earth and that they are styled similarly to Earth clothing. It mainly consists of stylized skirts and/or caprices with with knee high socks and boots or sandals (similar to what they wear regularly). The wings show images that could either relate to the power or power theme. They all also obtain a type of wrist accessory.