They're at 8 seasons and counting. W.I.T.C.H. fans continue to be flabbergasted.

Background Information

Winx Club is an Italian animation created by Iginio Straffi in the mid-2000s. Incredibly popular in its home country and across the world, this series has expanded into other mediums with spin-off games, comics, movies, and novels. The series focuses on Bloom and her friends, collectively known as the Winx Club as they explore the magical universe and defeat villains who threaten the entire dimension. As of early 2019, this series has eight seasons, a live-action movie in production, many novels, a couple of spin-off television shows, an ongoing comic, and other projects continuing. 

Canonicity

For the most part, all works are self-contained. The animation and movies are mostly connected, though there are some irreconcilable events that occur between them. The comics and games are set in different universes from the rest of the works. The spin-off World of Winx is almost surely set in its own independent universe as well. The same goes for the other spin-off Pop Pixie. There is no official word on the novels. The live-action series Fate: The Winx Saga also appears t be unrelated to any other series. Basically, nothing is canon to each other besides the main television series and some of its movies. 

While the series was originally produced by Rainbow, an Italian company, seasons five and beyond were co-produced by Nickelodeon. This is because Viacom became co-owner of Rainbow in the early 2010s. These seasons are written in English first and recorded in English first as well. This means that the show's canon for seasons one through four and the first three movies is in Italian, while everything else that follows season five (including spin-offs such as World of Winx) have their canon in the English version up to the eighth season. In the eighth season, the American team that had been directly been overseeing the episodes pivoted to a consulting role, and it is currently unclear which version has priority. . 

Standing in the Battledome

Winx Club is a formidable series though it suffers weaknesses in regards to its resistance to hax. In the show's first three seasons, it tops out in the multi-city block to low town level in terms of power and durability for almost all characters, though many characters are notably much weaker. The series tops out at universe level, potentially multiverse level since the Dragon Flame has been noted to be a stronger force than the source of the universe itself, Sparx. In its fourth season, a massive increase in speed and power occured, and most characters were place at small island level to poentially country level. In its fifth season, the Winx broke into the small star level territory, and there were a couple of characters that were in the solar system-level power and durability. For a few seasons, the characters were around superhuman in speed before moving on to massively hypersonic in season 4. They then reached FTL and massively-faster-than-light speeds from season five and onward. Transmutation, time stop, and BFR were used more often back in their earlier seasons. 

In its sixth season, it gets hit with powercreep that now puts its top and god tiers in the universe level+ in terms of power and durability, primarily because of powerscaling from the aforementioned universal character from before. The characters also have several noteworthy FTL feats and newer-but-less-used hax such as energy sensing, power removal, and BFRing outside of space-time.

The comics are are notably weaker due to suffering from the same lack of feats that the original seasons went through. Though it has the some universe-level characters such as the Great Dragon. There is an arguable moon-level feat mid-way through, but due to slow translations, it's difficult to assess its legitimacy as an outlier or not. It's speed is also closer to superhuman.

The World of Winx spin-off is weak as well. It's weakness comes from the fact that it's unknown when it splits from the main timeline or whether certain concepts even exist within it. It mainly lies around wall-level at best with possibly peak human speed.

It's also important to understand the differences between the various fairy forms:

1. Base: a fairy is in her ordinary body, which is when she is able to use magic, but its potency is at its weakest. 
2. Base Fairy ("Winx"): the basic fairy form that all fairies can access as they enter their first years in whatever fairy school they choose to enter. 
3. Charmix: a stronger fairy form that previous form.
4. Enchantix: the "final fairy form" that is obtained by most fairies. It's primary functions revolve around shrinking in size and fairy dust, which allows for healing. This is stronger than Charmix.
5. Believix: this a fairy form after the "final fairy form." This is demonstrably stronger than Enchantix, and its power increases when more people believe in fairies. Unlike earlier fairy forms, this form cannot fight effectively underwater.
6. Harmonix/Sirenix: demonstrably stronger fairy forms than Believix. These forms grant the ability to fight underwater, which makes it superior to other forms that previously could do so while remaining stronger. Sirenix specifically allows the ability of accessing the Infinite Ocean dimension. Sirenix is clearly stronger than Harmonix. 
7. Bloomix/Mythix: the first forms where the Winx each have a part of the Dragon Flame inside of them. Also demonstrably stronger forms than the last. Mythix's only addition is that it allows fairies to enter the Legendarium dimension. 
8. Butterflix/Tynix: Butterflix is a form that is given by nature for defending fairy animals, but it isn't one that gives a boost of power over Bloomix. Tynix is an ability that allows fairies to access miniature dimensions. Likewise, there is no discernible boost in power.
9. Cosmix: allows the Winx to bring back "light" to ever star that lacks it. This form also grants the Winx the ability to use light-based attacks (though Stella already had access to this, which is why she could already affect characters that others could not), which is what allows their attacks to harm the villains they had been facing during that season. 

There is a feat catalog here: https://www.narutoforums.org/threads/winx-club-feats-catalog-eat-your-heart-out-barbie.907668/

Supporters of the Series

• To the eight-year-old European girls of the OBD: you can sign here 
  
  

Character Profiles

The Winx (TV)

Aisha/Layla	Bloom	Flora	Musa	Roxy	Stella
Tecna

Fairies

Arcadia	Aurora	Diana	Faragonda	Nebula	Sibylla

Witches 

Belladonna	Darcy	Griffin	Icy	Lysslis	Mandragora
Selina	Stormy	Tharma

Sorcerers and Wizards

Acheron	Anagan	Duman	Gantlos	Ogron	Valtor

Specialists and Warriors

Brandon	Hagen	Helia	Nabu	Nex	Riven
Sky	Thoren	Timmy

Nymphs

Daphne	Politea

Miscellaneous

Brafillius	Darkar	Great Dragon, The	Kalshara	Knut	Swan of Infinity
Tritannus

World of Winx

Aisha	Bloom	Crocodile Man	Flora	Jim	Musa
Roxy	Shaman	Stella	Tecna	Tinker Bell

The Winx (Comic)

Aisha	Bloom	Flora	Musa	Stella	Tecna

Note: Some links on this page are affiliate links where, at no further expense to you, I receive a small commission should you purchase an item. For more on these, see our disclosure policy.