Winx Club (2004)

S1E10 Magical Reality Check

The girls dive into a virtual reality game where they can only use one potion and must depend on their Winx powers for everything else. Bloom goes first, but the witches interrupt, sending Kikko into the lava and stealing Bloom's dragon fire. As the game becomes increasingly unstable, Bloom remains trapped inside. She manages to locate Kikko, and together they work to repair the VR chamber, ultimately allowing Bloom to escape. In a surprising twist, they discover that the witches don't actually possess any dragon fire after all.