The Monster Under the City World of Winx : Season 1 Episode 4

The Winx have found a pocket watch that was dropped by Crocodile Man. They and Naoki try to capture Crocodile Man, but the latter proves to be very strong and elusive. The Winx discover that Crocodile Man is more interested in going after the watch than Naoki. Although Crocodile Man gets the watch and escapes through a portal, Tecna has placed a tracker inside that watch and they learn that Crococile Man has escaped into the World of Dreams.