Mint is the female player character in Pokémon Card GB2: Here Comes Team GR!. Her male counterpart is Mark and her rival is Ronald. Since the only game she appears in was not released outside of Japan, she has no official English name.
Like Mark, she is a player of the Pokémon Trading Card Game who lives on TCG Island. She is called on for help by Dr. Mason when Team Great Rocket attempts to steal the Legendary Cards and kidnaps many of the Club Masters.