Opal - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon Sword and Shield have some version exclusive gym leaders

POKEMON SWORD AND SHIELD - All Gym Leader Battles Gameplay (All 10 Galar Region Gym Battles)

Pokemon Sword's Stow-on-Side gym: Guide to beating Bea - Polygon

Pokemon Sword and Shield Galarian Gym Leaders Prints

Pokemon Sword/Shield Gym Leaders by albinoleopard -- Fur Affinity [dot] net

Pokémon: The D&D Alignments Of Galar Gym Leaders

Pokemon Sword & Shield cosplayers go viral as Gym Leaders Nessa & Bea - Dexerto

Sword and Shield Gym Leader Doodles

Pokemon Sword and Shield - Piers Gym Challenge (Spikemuth) Guide – SAMURAI GAMERS

I drew myself as an Electric-Type gym leader for pokemon sword and shield [OC] : r/pokemon