From Bulbapedia, the community-driven Pokémon encyclopedia.
Casey (Japanese: ナナコ Nanako) is a nominally recurring Trainer in the Pokémon anime.
She and her family are fans of the Electabuzz baseball team, and she loves Pokémon with the team's colors, yellow with black stripes. She started with a Chikorita, which she received from Professor Elm of New Bark Town.
In the original Japanese version, Casey speaks with a Kansai dialect, in which natives to Osaka, Japan speak. Adding to this is Casey's love of the Electabuzz baseball team, an analogue to the real world Osaka baseball team, the Hanshin Tigers. Not only is there a similarity in both Electabuzz and tigers being striped animals, but the Hanshin Tigers are known for having a very loyal fanbase.
Casey has been compared to Ash in his early days of Pokémon training. However, they have different styles of training, and different tastes in Pokémon.
This listing is of Casey's Pokémon as of Those Darn Electabuzz!:
Casey's Pidgey and Rattata were only seen in Casey's battle with Ash in The Double Trouble Header. It is likely that these Pokémon were chosen as a reflection of her being a beginning trainer at the time. While Meganium, Beedrill, and Elekid are often seen out of their Poké Balls, Pidgey and Rattata have not been heard of since Casey's debut episode.
|| ナナコ Nanako
|| From 七子 seventh child
| English, German
|| From the poem "Casey at the Bat"
|| 나진 Najin
|| 奈奈 Nàinài
|| From the first part of her Japanese name.