From Bulbapedia, the community-driven Pokémon encyclopedia.
Mollie (Japanese: ミカ Mika) is a character of the day who appeared in What I Did for Love!.
Mollie was a rookie Pokémon Coordinator appearing in her first Pokémon Contest. She seemed to have trouble finding out where to register until Brock told her it was at the front desk. She made her Appeal with her Raticate by using Hyper Fang on a stick of wood. She made it to the second round and used Absol, but the two lost to Brock and his Marshtomp.
In the end, Top Coordinator Yuma decided to take Mollie under her wing and show her how to develop her skills, as she felt that Mollie needed more advice than Brock.
This listing is of Mollie's known Pokémon in the anime: