North55

11 hours ago, theSLAYER said:

This could be a game problem that mitigates any hacking (not just PKHeX), but then again I've only heard this happen on Citra.

Here are some other threads:
https://projectpokemon.org/home/forums/topic/49788-only-gaining-1-exp-per-battle-ultra-sun/
https://projectpokemon.org/home/forums/topic/47019-exp-gain-reduced-to-1-after-save-edited/

Sadly, there's no known fix.

My advice is: don't hack your save at the beginning. Wait till you've unlocked trading before you hack your save.
Next, make sure your game is not modified in any way. It would be ideal if it's a fresh dump from your own 3DS.
(not a pirated copy. Also reminder: piracy is not allowed on our site)

alright I guess I will just use PKHeX to get a bunch of Rare Candy and level up that way.

15 minutes ago, theSLAYER said:

at what point of the journey did you first use PKHeX?

Near the beginning but the problem didn't start until later on. On the second island about.

Hey I was just wondering if there was a fix for this?