Both are very strong, but in the end Bloom defeated him.

^ But that was courtsey of the Water Stars, without the Water Stars she wouldn't have won :P

Yeah, but don't forget that Valtor had collected new and new powers from many realms which highly boosted his powers, plus in the final episode he turned into a demon (which is stronger than his wizard form), so...

This picture makes him look like he's in some intense heavy metal video and now I can't stop laughing XD

I'm with WinxClub_Stella. And even before he started really collecting those spells, he would have battled Bloom on Andros if Layla hadn't stepped in to defend her kingdom. Plus he could already blind people and turn mermaids into mutants so—that's still pretty powerful. He even burst out of Omega by himself! (The Trix may have helped or but I can't be sure...I think they did, I can't really remember) Plus he took down Bloom's parents, and I think that was right after the Ancestral Witches created him. Even then he was still very strong. Like, he took them down, and the both of them most likely have some dragon fire in them, and he did it without any effort at all.

I agree with @SummerThunder. Yes, Valtor very strong, but Bloom is stronger. She defeated Valtor.

Bloom only won becasue of the water stars and the rest of the winx. Valtor was way stronger on his own. Not only was Valtor powerful without any aid but Bloom is just weak in general.

Valtor definetly

Bloom. I mean she beat him.

I have no idea how Bloom beat Valtor, but people are saying that Bloom, the Winx, and the Water Stars had to defeat him. So if Bloom were on her own, I think Valtor would've killed her.

Valtor for sure...