User blog comment:Aphrodite Sweetheart/Official Winx Club WOW and 4th movie discussion blog/@comment-31892545-20170526145110/@comment-29197449-20170528031138

It's not entirely Nick's fault though. I'm not completely defending their actions, especially taking into account how two seasons that are almost unanimously considered to be the worst of the series happened with them as the series co-producers. With Rainbow and, more importantly, Straffi himself, they could have made Roxy the seventh Winx. Heck, there's even an episode of Season 4 titled "7: The Perfect Number" in one of the dubs that alludes to this. If that were the case then there should've been no stopping Straffi from adding Roxy into the group, but he still didn't do it. I know that there are other factors in play, but with how hard they teased Roxy becoming a Winx, it's kinda hard to believe that the co-producer that wasn't around for the whole series was the cause of this change. And honestly, every time we progress into the next season, all of the events of the past seasons are basically ignored, regardless of who Rainbow ends up partnering with.

As for Roxy fighting in her Believix, I feel like it's purposely being avoided. Roxy even acts like she can't transform when she and Bloom were chasing Jim (granted, they were out in public). I feel like they're avoiding it because they want Dreamix (and soon Onyrix) to be the Fairy Forms to focus on. They want us to know that Roxy's there but they don't want her to detract too much of our attention by being the Odd One Out if she were to transform and fight.