Wow, incredible job. As a pixel artist myself, these overworlds can be a nightmare to get right!
You know, Drayano is working on their HeartGold/SoulSilver romhacks and they're combining them into basically gen 4 Crystal. I'm not sure if Dray would be down, but if you were to make a player character Crystal sprite as good as these, I wonder if they'd put it into the games as a possible player character.
I tried this myself but couldn't get it to look right, and the ones that have been attempted that I found online aren't quite up to professional quality.
hmu at my twitter @plasmi99 if you wanna talk haha