Quote Originally Posted by Greyfox View Post

For instance--we could start over from scratch, but designate some of our old Pokémon to a standby position. We won't be able to use them rightaway, but we won't outright lose them either. After as few months or so, we can use them again.
Kind of reminds me of what Ash does whenever he starts a new league. Leaves his old Pokemon behind at Oak's lab and then recalls them later for major battles down the line.