The gyms have an item called
Sting Wrap, Which is a chicken roll with some medicine in it. They give it away if you beat them. It heals all status conditions and fully restores the pokemon's HP. Also, just note, the best place to catch pokemon is the safari zone. But, to get there, you have to either take a ride which costs 5 coins (Unless you take the ride from ingot town), or have a horse (Which is usually mudbray, mudsdale, ponyta, rapidash, blitzle, zebstrika, or a real horse if you are lucky. Real horses are much faster and stronger, but cost a lot more).
If you beat any of the gym's pokemon, even just one, you will get a horse voucher. Redeem it only at night, it's a feurte kaija tradition.
Pokedex's were not invented yet, so just don't use a pokedex. It's 184 years before gen 1, so yeah.
@Sky5372 Approved.