You were out training your Pokémon, when you found Lana sitting on a swingset barefoot, swinging her legs back and forth. She smiled at you and showed her soles. However, when you looked closer you saw a very tiny trainer on each foot. Her right sole had a trainer with black clothes stuck to the sole, and her left toes have a trainer in white clothes, clinging onto the foot desperately. She doesn't seem to be aware of either.