>>45684871I can't be bothered to make an image, but here's how I would fix Johto's Gym Leaders:
Falkner: Murkrow (can now be found earlygame), Fletchinder, Pidgeotto
Bugsy (Double Battle): Ledian, Ariados, Scyther, Pinsir
Whitney (now a Fairy-Type Gym Leader): Wigglytuff, Togetic, Granbull, Clefable, Miltank (now Fairy-Type)
Morty: Trevenant, Noctowl, Sableye, Meowstic, Mismagius, Gengar
Chuck (Double Battle): Primeape, Hitmontop, Heracross, Crabominable, Politoed, Poliwrath
Jasmine: Magneton, Ampharos, Aggron, Starmie, Skarmory, Steelix
Pryce: Ninetales (Alolan), Stoutland (now has Slush Rush, instead of Sand Rush), Abomasnow, Weavile, Cloyster, Mamoswine
Clair: Gyarados (now Dragon-Type), Druddigon, Altaria, Zoroark, Dragonair (now has 540 BST + Drizzle), Kingdra