User blog comment:Leon Jung/I wonder if the Winx could use their old power?/@comment-10921179-20140423073044/@comment-27111026-20140423151401

No. You're wrong. The Winx is unable to use the Charmix power because they use all the Charmix energy to battle against Darkar. And the same with the Trix when they give all their Gloomix power to Darkar's shadow monsters in order to prevent the Specialists and the Winx to get in to save Bloom (even they failed saving her from being transformed to Dark Bloom).