Simplify the following text for a Grade 5 native English-speaking person.
Original: However , Roxy is seen going to Magix with the Winx in the finale of the fourth season .
Simplified: The Winx find the last fairy , Roxy , then earn their Believix after Roxy believed in fairies . Through the first half of the season , the Winx and Roxy battle against the Wizards .