Katie is the pride of Lilycove City, where she has the nickname "cool beauty" because of her fashion and flair. Her hobbies include playing the clarinet and her favorite food is spicy spaghetti with Tamato Berries. In battle, she most commonly uses Venomoth and Golduck and is known for carefully analyzing her opponent's moves.
Katie's battle style was different from many other typical Trainers in the anime. Instead of sticking with one Pokémon in battle until it fainted, she would switch out her Pokémon for a stronger one if hers had a disadvantage. It was due to this strategy that she nearly defeated Ash in the first part of their battle.
During their battle, she took out two of Ash's Pokémon without having any of hers faint. Ash finally was able to take out her Dugtrio with his Glalie. However, the Ice-Type was soon defeated by her Misdreavus' Destiny Bond.
However, Ash was able to turn the battle in his favor using his three remaining Pokémon. His Corphish took out her Golduck while confused, and from there, he eventually defeated Katie and moved on in the Victory Tournament.
Katie's Venomoth was the first Pokémon used in the Hoenn League Ever Grande Conference. It battled against Ash's Torkoal. After dodging a flamethrower from Torkoal, Katie recalled Venomoth. It later battled Ash's Corphish and Ash's Swellow.
Katie's Golduck was the second Pokémon used in the Hoenn League Ever Grande Conference. Using water-type attacks, it managed to beat Ash's Torkoal. Because Katie knew that Pikachu was at an advantage against Golduck, she recalled it. Golduck then fought Ash's Corphish and used Confusion to confuse it. Despite being confused, Corphish managed to beat Golduck with Vice Grip and Bubble Beam.
Katie's Dugtrio was the third Pokémon used in the Hoenn League Ever Grande Conference against Ash. It fought and thanks to its type advantage, defeated Ash's Pikachu easily, but was defeated by Ash's Glalie's very powerful and super effective Ice Beam.
Katie's Misdreavus was the fourth Pokémon used in the Hoenn League Ever Grande Conference. It was seen briefly in battle against Ash's Glalie where it was easily defeated. However, Katie tells Misdreavus to use Destiny Bond taking Glalie down with itself.
Katie's Scizor was the fifth Pokémon used in the Hoenn League Ever Grande Conference. It battled against Ash's Swellow and proved to be very powerful using a combination of Double Team and Metal Claw. Eventually it lost to Swellow's super effective Aerial Ace.