Kobashi

Cassie is a minor recurring character of the Pokémon anime.

She first appeared in Jostling for the Junior Cup!, where she participated in the Pokémon World Tournament Junior Cup and was Geraldo's first opponent. However, she was defeated by him and eliminated from the tournament. She made a cameo appearance in Goodbye, Junior Cup - Hello Adventure!, where she lined up with all the other competitors in front of Alder, Cynthia, Caitlin, and Freddy O'Martian.

(Source: Bulbapedia)