Even though you will have no choice but to have Pikachu as your Starter Pokemon in Pokemon: Let's Go, Pikachu, it will immediately become your Partner during your journey throughout the Kanto Region. As your Partner Pokemon, Pikachu will always be with your trainer. It will never be carried within a PokeBall, but rather will travel with you by sitting on top of your trainer's shoulders at all times. Even if your trainer is riding on another Pokemon, Pikachu will remain positioned in this same spot! In addition to this, Pikachu will even jump off of your trainer when sent into battle!