hhhhmmmmmm maybe? but i doubt it it ... charmed was towards the end of its run and wasn't near as popular as it was when it started in 98 ... and really wasn't aimed at the barbie demographic ... was a bit violent and scary for barbie play fans ... and if they were aiming at the older fans they would have done collector dolls not bright colorful cheaper dolls meant for play ...
harry potter was bigger factor i think ... secret spells was aimed at the barbie play age and riding the coat tails of the second HP movie and the fifth HP book if i remember right lol i remember a lot more HP fan girls asking about them (after they were off the shelves already) than the Charmed fanbase ... but magic in general was huge because of HP's popularity (HP published in june of 97, charmed first aired in october of 98) sabrina the teenage witch was done, ut showing in syndication at that point ... wasn't ever crazy popular like either HP or Charmed though ...