Fantina/Anime/Main series

Despite having traveled through Hearthome City twice, once in Dawn's Early Night! and a second time in Arriving in Style!, the Hearthome Gym remained closed with the Gym Leader nowhere in sight. Fantina had left a note saying that she was going on a journey for a while, and to not look for her. She finally appeared in Playing The Leveling Field!, where she had a practice Contest Battle with Zoey. Although she won the battle with relative ease, she complimented Zoey on her skills and said that she was a formidable opponent. She later battled and defeated, the defeat prompting him to come up with a special tactic to counter Fantina's Pokémon's -inducing skills, which Fantina dubbed the Counter Shield.

In her debut episode, it was revealed that as soon as she arrived in the Sinnoh region she decided to take part in Pokémon Contests. She excelled at them and, with the help of her, she was able to win the Grand Festival. After becoming a Top Coordinator, she was invited to assume the position of Gym Leader for Hearthome City's new Pokémon Gym, which she accepted. As a Gym Leader she was faced with new responsibilities and her desire was to offer a good battle to the many s who would come to challenge her. In order to achieve that goal, she went on a to develop a unique battle style, combining the raw power of regular battles with the stylish moves of Pokémon Contests, and that was her reason for temporarily leaving the Gym.

It was also revealed that she battled Alan twice with him winning the second time after evolving his. In Aiding the Enemy!, it was revealed that Paul had managed to defeat her.

Ash met with Fantina upon returning to Hearthome City in Barry's Busting Out All Over! and had an official Gym battle against her in Shield with a Twist!, where he defeated her and earned the, his fifth Sinnoh League Badge overall.

In Gotta Get a Gible!, it was revealed that Fantina had once again left her Gym, so had to take a number in order to battle her when she came back.

Fantina appeared from Last Call — First Round! to A Grand Fight for Winning!, having yet again left the Gym in order to join Mr. Contesta, Mr. Sukizo, and Nurse Joy in the judging panel for the Sinnoh Grand Festival as a special guest judge. Fantina was very excited throughout the competition and on some occasions she would rise from her seat to comment on a combination she felt was impressive. After the final battle between Dawn and Zoey, she was the one who handed Zoey the Ribbon Cup.

She made a cameo appearance in the ending credits of Zoroark: Master of Illusions.

