Yep, yellow haired kid, starts w/ Sceptile
http://www.serebii.net/manga/characters-new/emerald.shtml
Still great so far.
* Note- not mine, if you have an account, ask for permission.
Here's Hoenn mugshots-gym leaders, with there badges- http://browse.deviantart.com/?qh=§ion=&q=hoenn+gym+leaders#/d3718vh
Here's revamped sprites for the gym leaders- http://sixsamuraiftw.deviantart.com/art/Hoenn-Gym-Leaders-275368883?q=boost%3Apopular%20hoenn%20gym%20leaders&qo=21
And here are overworlds- sorry only front, best i can find currently. If your a skilled pixle artist, you can use these as a base for the gym leaders- if not, find more- http://browse.deviantart.com/?qh=§ion=&q=hoenn+gym+leaders+overworlds#/d4x5d5t
Sydney mugshot- http://hunterkharon.deviantart.com/art/Elite-Four-Sidney-Mugshot-137590870?q=boost%3Apopular%20hoenn%20elite%204&qo=11
And that's it so far. I'll update you on anything I find later today.
*Later Today*
I've noticed no music changes.( I take that back, trainer battle i hear it, was playing muted during other ones earlier). And I'm waiting for gym edits before i face down Cress.
And since you can't get rid of them, I suggest a rock type instead of Lillipup.
Cilian- Lileep
Chili- Slugma
Cress- Corsola
Also- based on gym layouts, I suggest an order change, and some E4 upgrades with gym leaders.
Gym 2- Norman
Gym 3- (I honestly have no suggestion, maybe Bugsy? I mean what other Bug- type is there for gyms. And Erika and Gardenia don't fit in with the Hoenn part. or maybe poison- again no hoenn equivalent. Or make yourself a gym leader or something. Glacia and Drake don't seem like artists to me.)
Gym 4- Wattson
Gym 5- Flannery
Gym 6- Winona
Gym 7- Wallace/ Juan
Gym 8- Tate & Liza
E4-
Shauntel- Pheobe
Grimsley- Sydney
Marshal- Brawly
Caitlin- Roxanne