Pokemon TCG: Champion's Path Special Pin Collection - Rules of Play says:

Celebrate your Pokémon Trainer Journey with a Champion's Path Special Pin Collection! When you visit the Stow-on-Side Gym, you might step into one of two completely different Gyms, each with a different challenge, a different Pokémon type focus, and even a different Gym Leader—and the same goes for the Circhester Gym! This awesome collection features two collector's pins with both of that Gym's logos, foil cards featuring the partner Pokémon of both Gym Leaders, and five booster packs from the special Champion's Path expansion. Continue your journey and defeat your rivals!