Great game, I love the fact that this game makes the Berry moves useful, and the pick-your-Pokemon approach with the limited Pokeballs + 100% catch rate was very refreshing. I did find some bugs and notes, and so I'll list them here:
The description for Focus Sash and Zoom Lens doesn't fit in the text box in the bag.
Torkoal (Custap Berry) and Pancham (Rowap Berry) crashes the game every time I use Bug Bite or Thief on them. Rowap also doesn't activate when it should.
Using Air Cutter against Smeargle caused my Woobat to have recoil like Double-Edge (except Smeargle didn't act that turn due to Attract).
Air Cutter also did the same with Conkeldurr, but with an attack/defense drop like if it used Super Power (which Conkeldurr did use the same turn, even though it was papalized).
(both of the above happened only once over multiple battles against both trainers.)
Mummy activated against 2-turn moves like Dig and Bounce on the first turn.
And some tile issues here:
https://imgur.com/a/f7EPFMK
I also wanted to say that it would be nice that the Pokémon in the final area is bumped up from 14-16 to 16-19. I had a team of level 21-22 average Pokémon by the time I reached the boss of Dark City, and it was over an hour to get my Pokémon leveled enough to be able to take him on.
There is 2 move tutors for Nature Power. Though the second one is free it still fells redundant.
And finally was there only 5 Pokéballs available? That was all I found in game.
The music puzzle has the music tiles as CDEFGABc, but from what I've seen it should be cDEFGABC. I'm not any way an expert on music, it's just what everything I have been seeing was saying.
Emulator used mGBA 8.1 and GBARunner2.
Final team: Dedenne, Woobat, Yamask, Carnavine, Torkoal (traded for Grimer).
Overall though it's a very nice game, would definitely recommend.