I have just finished the beta, 31 hours in. It's awesome. Thank you so so much for creating this game.
The last Pokemon game I played was Soul Silver, so I really enjoyed all the innovations you've included like exp from capturing, chaining repels, and of course the enormous Pokemon variety. If only Nintendo had the balls to just put all their creatures out there in the wild and trainer battles of a game.
And the writing eclipses any Pokemon game I've played. I'm not ashamed to say I'm 25 and still playing Pokemon. Your dialogue is so witty, knowing and adult. It started on an obscene high, with gems like blocking the way with Psyduck who "aren't inclined to move at all", that kid in the Poke mart who once impulse bought an escape rope, and a trainer in the flying gym saying "the reign of grounded peasants ends today!" But the second half felt just a little bit more generic Pokemon storyline. There was/is definitely more mileage in being best buddies with the gang leader in Telmurk.
I've personally only encountered endure acting like protect and in fact healing by 1hp, and the 'Lv' disappearing issue, but it's purely cosmetic and comes and goes. I even raised the first Ralts I caught successfully to Gardevior, and then read that there was this whole issue with them.
As for things I'd like to see improved:
Outside Apex temple, give the player the option to go with your rival to keep following the storyline, but also an option to go back to Windmist. I'd ignored the gym there and gone straight up the mountain, so I then had to do quite a bit of running around to get back to the gym. I really like the quite tight storyline you have going and how the first five gyms flow.
On Sabulo island the tower is obviously great exp and then a great reward at the top, but the final couple of floors felt just a little grindy, and then you have to go all the way back down to heal and back up for the final boss. How about making them a pseudo- battle marsh experience where you fight a full competitive team, get healed and save, fight another full team etc...
Just remove all not fully evolved Pokemon from the battle marsh Pokemon tables. The leader battles you get every 20 are awesome, but the 19 battles in between are quite meh, especially now I trained up a Mega Pinsir. I think I only felt under pressure one time.
My final word is don't rush the next beta. Get it right. If the game ends right here, I'll consider it among the top 10 gba games I've played.