Janina appeared in several episodes of the anime. Her first appearance was in Fight for the Light!. She challenged Ash to a battle, but cheated by putting water-resistant polish on her Onix. After apologizing, she helped Ash and the others go to Cianwood City to help get medicine for Jasmine's sick Ampharos, Sparkle.
She also helped out during Jasmine and Ash's Gym battle in Nerves of Steelix!, acting as the referee. One of her dreams is to become a strong Pokémon Trainer, and Ash told her that he would eventually come back to battle her when she became stronger.