The oben, nach oben ten characters of Winx Club vs. Avatar : The Last Airbender are:

~*Stella*~ - Rank: 1st
She is a star, sterne fairy of Winx. Her best friend is Bloom. She is the most famous character in this club. The Fan made couple Stuko includes her.

~*Azula*~ - Rank: 2nd
She is a bender from Avatar. She is a really well-known character here. Bloom is a close friend of hers as the Fans wants it that way.

~*Zuko*~ - Rank: 3rd
Thanks to Stella, he is 3rd. He is a bender from Avatar. He likes Katara, but most of the Fans here wants Stella to be with him.

~*Bloom*~ - Rank: 4th
She is considered to be the leader of the Winx. She is a feuer fairy. Bloom is hated Von a lot of Fans here, but she is also adored at the same time.

~*Musa*~ - Rank: 5th
Musa is a Musik fairy, her name makes Du understand that. She is a Winx fairy. Musa is paired with Aang in here often. She is quite cool in this club.

~*Katara*~ - Rank: 6th
Katara is from Avatar. She is a beloved person in here. She likes Zuko, but most choose Zuko to be with Stella.

~*Aang*~ - Rank: 7th
Aang is an Avatar. He did not want to be an Avatar at the first place, much like Roxy did not want to become a fairy. He is often paired with Musa and sometimes Roxy.

~*Toph*~ - Rank: 8th
Toph is from Avatar. She is a cute gal. She is cool in here. I just adore her like some others.

~*Tecna*~ - Rank: 9th
Tecna is a technology fairy. She is from Winx. The other Winx girls think her normal, but Musa has feelings for her and also Kimmy, her boyfriend. She is wonderful in here.

~*Flora*~ - Rank: 10th
Flora is a nature fairy. She is a Winx fairy. Helia is with her. People think Helia is Mako sometimes for they have the same voices. She is the number tenth in here.

That is obviously what I think. It is a tie between them. Avatar has five winners and Winx has also five winners. This is my opinion. Kommentar your thoughts about it! Hope Du enjoyed it!