The Monster Under the City (S01E04)

The Winx stumble upon a pocket watch left behind by Crocodile Man. Teaming up with Naoki, they attempt to catch him, but he proves to be both powerful and slippery. As they pursue him, the Winx realize that Crocodile Man is more focused on retrieving the watch than on Naoki. Ultimately, he manages to snatch the watch and flees through a portal. However, Tecna cleverly embedded a tracker inside the watch, allowing them to discover that Crocodile Man has vanished into the World of Dreams.