Korrina first appears on Route 5, when one of her Lucario comes up to the player while she is doing some special training. She notes about how Lucario has taken a liking to the player's aura, then introduces herself to the player as the Shalour City Gym Leader. She then appears in Geosenge Town, where she challenges the player to a battle with her two Lucario.
After arriving in Shalour City, Korrina can be found in the Tower of Mastery with her grandfather Gurkinn, the Mega Evolution guru. Once the player wins the battle for the Mega Ring against their rival, Korrina will go to her Gym for a battle.
After battling her at the Gym, she will immediately invite the player to a rematch atop the Tower of Mastery. There, Korrina gives the player the Mega Ring. After that, the Lucario that had become close to the player temporarily joins their team, and the two have a one-on-one battle, using just their Lucario, both holding a Lucarionite. Win or lose, the player has the option of getting the Lucario that joined them for the battle.
Once the player obtains rank of Marquis/Marchioness at the Battle Chateau, Korrina and the other Gym Leaders will be able to be battled there for rematches. There, Korrina will possess the rank of Marchioness.
April: "Hello! It's time for Gym Freaks, your source for the hottest news about hot Gym Leaders in Kalos. So... I'm now in front of the Shalour City Gym! ... Eeek. Korrina has arrived! She's cute! So cute! The way she dresses up in costume-like clothing makes my heart go crazy! Lately, Korrina has been in the PR Video Studio! Following two years of planning and another year of shooting, her highly anticipated new PR Video is scheduled for release at the end of next year! Oh... She went inside the Gym... That's all for the on-site report. Good-bye for now, everyone."
April: "Hello! It's time for Gym Freaks, your source for the hottest news about hot Gym Leaders in Kalos. So... I'm now in front of the Shalour City Gym! ... Eeek. Korrina has arrived! She's cute! So cute! The way she dresses up in costumes make my heart beat pit-a-pat! Her legs are so magnificent that her axe-kick move can shatter cave rocks into pieces! If I were her, I wouldn't need the HM. Oh... She went inside the Gym... That's all for the on-site report. Good-bye for now, everyone."
Korrina and her Lucario appear in Pokémon UNITE as an enemy Trainer to fight during the Legacy Trainer Showdown event between September 9, 2022 and October 6, 2022. The event later returned between April 21, 2023 and May 21, 2023.
In Trevenant Pokes, Korrina returned to the Tower of Mastery, where she demanded that Gurkinn explain why he gave X a Mega Ring. Before Gurkinn could answer, the tower was attacked by a Trevenant used by Essentia, another Team Flare member. Korrina and Gurkinn fought the villain, only for Essentia to reveal she was distracting them while her Trevenant covered the tower in vines, trapping them inside. In order to prevent the secrets of Mega Evolution from falling into the wrong hands, Korrina reluctantly helped Gurkinn activate the Tower of Mastery's self-destruct mechanism, destroying the building and allowing them to escape.
In Connecting with Gardevoir, Korrina met Diantha, one of Gurkinn's students. Diantha led Korrina to a nearby river where they found Gurkinn under attack by Chalmers, a Team Flare Admin. Once Gurkinn was rescued, he, Korrina, and Diantha used their Mega-Evolved Pokémon to defeat Chalmers. Afterward, Diantha joined Korrina and Gurkinn and they set off to keep the Legendary PokémonXerneas and Yveltal out of Team Flare's clutches.
In Tying Trevenant, Korrina, Gurkinn, and Diantha helped X and his friends fight Team Flare on Route 9 to stop them from taking Xerneas's tree form. Gurkinn helped X take on Essentia, Diantha was challenged by Malva, while Korrina went ahead to keep Celosia from transporting Xerneas to Team Flare's base. After a tough battle, Korrina's Lucario defeated Celosia's Aegislash, but fainted from exhaustion afterward. As she confidently proclaimed victory, Korrina failed to notice Celosia's lurking behind her and launching an attack. Later, X and his friends found Korrina's unconsciouus body, where they learned that Celosia successfully took Xerneas as well as taking the Key Stone in Korrina's Mega Glove.
In Quilladin Stands, Korrina was taken to a hospital in Laverre City to recover from her injuries. In Floette Returns, three months after Team Flare's defeat, Korrina was revealed to have fully recuperated. X was asked by Korrina to come to Shalour City to become an official Mega Evolution Successor. Once X arrived at the city, however, Korrina was upset to see that he did not bring his friends for the succession ceremony. She then had him call for his friends before proceeding with the ceremony.
Related cards Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.