Miki is a trainer who trained her Skarmory well. To have it gain more experience, Miki chooses Fire-type Pokémon to battle with, despite the type disadvantage. She managed to defeat Brock's Vulpix, and then defeated Ash's Cyndaquil. After some intense training, Ash challenged Miki again, this time defeating her. Realizing she has a lot to learn, she went with Skarmory to fight Gym Leaders.
Skarmory is Miki's only known Pokémon, which she uses in her many battles against Fire-type Pokémon, exploiting a significant type weakness.