Her deck strategy seems to be half powerful attacks, half opponent annoyance. She also uses Pokémon Trader to find mostly her Moltres. With the Firegiver Pokémon Power, Moltres brings 1-4 Fire Energy cards to her hand when it's placed on the Bench. She has Pokémon that can annoy with status ailments like her Fossil Magmar's Smog and Smokescreen, and her Vulpix with its Confuse Ray. Energy Removal helps prevent enemy attack, and Lass thwarts Trainer Card based strategies. She also retrieves many of her discarded Fire Energy cards with Energy Retrieval.
In Pokémon Card GB2
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At the start of the game, Courtney was kidnapped by Great Rocket and imprisoned in the Fire Fort. After being freed by the player, she will give the player an Arcanine.
Later on, the player is required to fight her in the Pokémon Dome to obtain one of the Legendary cards - Moltres.