Okay, just a few more things I picked up...
In the Owsauri Gym, if you head to the right and up the ice to battle the guy you will be on ice during the battle. This means that whilst the guy waks over to you normally along the ice, you slide and end up in a running animation while he is talking... It looks odd.
Also, maybe you gave the Owsauri Leader too many Super Potions. At first I was like, phew I'm glad I caught me a Growlithe earlier, but then I realised she had that stupid Lapras so I decided to Poison it. I was never able to get it down past half health as she has at least four Super Potions...
EDIT: In the Kids Clubhouse the kid with the GBA doesn't have a script. A child on the top story says "RED" as opposed to "Red" as well as saying "meed" instead of "meet".
EDIT 2: The guys that teach you the 'Mega' fighting moves say "MEGA KICK" and "MEGA PUNCH".
Also, one final thing. Although youhave moved many things around from FRLG, you can still tell that you've used them. I'm meaning things such as the Nugget Pass. It hasn've actually been changed. What IMO you should do is change the area from a long path into maybe some form of swerving path.
EG.
\ __________________________\
\___________________________ \
\ ___________________________\
With a trainer at the end of each path and the _ representing jumpable ledges. That way it makes it seem more unquie, otherwise it's the same old thing, with just a small tile change effectively. Of course, these are just my annoying ideas :P Obviously you'll do what you feel necessary.