Hints of Roxy being a Believix Fairy
1. Believix dolls of Roxy were produced.
2.The official Winx Club Facebook page replied to a fan's question saying that Roxy has Believix.
3. Roxy's appearance is that of a Believix Fairy.
4. On a poll on the official Winx Club website it was asked "Who looks the best in Believix transformation?" and Roxy was one of the answer options.
5. It is suggested that Roxy may have willed herself in earning Believix like how Bloom willed herself into earning Enchantix, also implying that Roxy's Believix might be incomplete.
Hints of Roxy being a Winx/Charmix Fairy
1. When Roxy first transformed it was similar to how Bloom first transformed in Season 1.
2. Stella and Bloom made people believe in magic in Season 1 but they did not earn Believix.
3. Roxy does not have the ability to use the Speedix, Tracix and Zoomix special wings that Believix Fairies can use.
4. Bloom said that Roxy does not have Believix powers when the Winx were about to go in the Amazonian Rainforest.
5. All other Fairies seen yet first had the Winx/Charmix transformation and then earned Enchantix. It is assumed that all Fairies must start with Winx/Charmix and then earn Enchantix and then earn Believix.
6. There are arguments against the fact that Roxy might have earned an incomplete Believix by her will: In Season 3 when Bloom went to Pyros, Maia told Bloom that only a Fairy possessing the Dragon Flame can will herself into earning a transformation. However Roxy does not possess the Dragon Flame and hence cannot earn a transfornation by will.
7. When first mentioning Believix to the Winx, Headmistress Faragonda told them that Believix is a level "above Enchantix", implying that only Enchantix Fairies can earn Believix.
8. Bloom, when earning Enchantix, did not skip any transformation as she had earned Winx (Rai)/Charmix (Nickelodeon), then Charmix (Rai), and Enchantix. She earned all the necessary transformations she had to earn before obtaining Believix. However, assuming she earned Believix, Roxy did not earn the previous transformations, possibly suggesting that she is still at the Standard Fairy Level.
Roxy did not get Sophix or Lovix, and only Believix fairies can earn these.