Korrina

Korrina (Japanese: コルニ Corni) is the Gym Leader of Shalour City's Gym, known officially as the Shalour Gym. She specializes in Fighting-type Pokémon. She gives the Rumble Badge to Trainers who defeat her. She is the only character in the games to have the Trainer class Successor (Japanese: けいしょうしゃ Successor).

Korrina appears in Pokémon X and Y as a Gym Leader from Shalour City. Trainers who defeat Korrina will receive the Rumble Badge, along with TM98 (Power-Up Punch). According to the television show Gym Freaks and an NPC at Café Action!, she is a PR Video star. It also states that she dresses up in costumes; her magnificent legs able to shatter cave rocks into pieces using her axe-kick move.

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 trainer 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 him/her for the battle.