Fantina/Manga/PA

Fantina appeared in Perturbed by Pachirisu. When two women were making rude comments about rookie contestants during the Master Rank contest, she sent out her Drifblim to carry them out and throw them back where the Normal Rank contest was taking place. The next day, Fantina met, and  in person, and transported the trio on her Drifblim to the Lost Tower just as Paka and Uji had spotted Platinum. There, Diamond and Pearl treated Fantina to their comedy while Platinum witnessed a battle on the lower floors of the tower. Fantina took the trio to Solaceon Town afterwards and left.

Fantina saved Diamond and Pearl from a fall in Celestic Town, and offered to take the trio back to Hearthome, where they discovered that she was the city's Gym Leader, saying that her studies for the lifetime passion of Pokémon Contests granted her the title. Fantina watched as made her way through the quizzes given by the Gym easily and took up the challenge, after which her Drifblim was beaten after Platinum's Empoleon manipulated it into freezing itself using its own wind. Her Mismagius, however, proved to be much trickier; its turned Empoleon's speed against it, and beat it easily. It then trapped Platinum and the borrowed in an illusion where the Pokémon was in a room full of its favorite sweets and Platinum suffered. Before long though, the girl managed to subvert the illusion in her favor with 's help, and defeated the Mismagius.

After the battle, Fantina and the trio learned of the disappearance of Professor Rowan and Platinum's father, Mr. Berlitz. She lent her Drifblim to the trio to assist with their emergency.

She later appeared on the Spear Pillar with the other Sinnoh Gym Leaders where she fought Team Galactic Commander Saturn along with Roark and together they defeated him. They later fought Cyrus on the top of the Spear Pillar and with the help of her fellow Gym Leaders, they managed to break his Red Chain controlling and. However, it was revealed that the one they destroyed was the artificial one he had made earlier and they were all defeated by him.