I got through playing the hack, and I must say Its quite a piece of work here. Im not sure if you've fixed some of these bugs or exploits skipping events but i'll list some of theme I've run into:
Music Missing from inside towns
Running shoes tend to work when they want to
An alternate Route on Route 21 allows me to pass the meeting with Gary
The Gameplay:
I'm not sure if you were just testing out the Pokemon Encounters, but Route 21 is ridiculously populated. I've ran into about 8 different kinds of Pokemon in the first Route. it felt like a safari zone. You should lessen the amount of Pokemon in the beginning routes. it's way too much for the beginning of a Pokemon Game. Also, the difficulty spike once you get to Route 1 is outrageous. The trainers and wild Pokemon were level 9-12. And since i had taken an alternate route to the Professors Lab, I was extremely under leveled. Even after I battled the Trainers on Route 21. I had to grind to be able to pass Trainer Lara.
The Characters and Text:
This needs plenty of work. I found the dialogue in this game to be very all over the place. It kind of felt like a random Fanfiction. What i mean is the conversation between the player and the mother made it seem as if the Mother wasn't sure what to say. The repeated word "Yeah" makes the sentence seem awful and unfitting for an Adult. I'd recommend fixing how you do the dialog. As in have one person talk per text box. Combining them makes it seem strange especially when you made the text different colors to distinguish who was talking. The interaction with Ash should also change. He took the time out to introduce himself and have a conversation with the Player, even though his Pokemon was injured.
Mapping:
Mapping need some work to be honest. It'd not bad, its just sort of bland. You should put in a little more creativity into it. Also probably add a little more flowers or structures to the towns. They seemed kind of barren. That or it was the tiles. I'd highly recommend going
The Map Rating/Review Thread. There you can post pictures of your map and get great feedback from excellent Pokemon Mappers. It could probably give you some ideas too.