Way back in... January, Alfea's former headmistress Mavilla decided to use her magic to wipe everyone's memories of training fairy animals. This will be important, because it's time for one last time trip... and Miniworld trip this week
Zap2It summary:
As the battle between the Trix and Alfea's fairies continues, the Winx use their stones of memories to go back to Alfea's past.
Well this was better the problem with time travel is always the effect on the future and some of the pets are from the past (50%). Its all too easy to get tripped up with time travel
I know Alfea has many secret rooms but a heart of Alfea makes sense with cloud tower having a heart.