User blog comment:Leon Jung/I wonder if the Winx could use their old power?/@comment-4074115-20140416033415/@comment-8796478-20140416063553

It might be that they aren't able to use the different powers of other forms, but since enchantix is the level wherein they are full-pledged fairies, and the others are just branches of it, then it might mean that the only retaining spells from their enchantix are their fairy dusts and miniaturization.