This is a port of camthesaxman's 2D soaring feature for pokeruby to pokeemerald.
Check out the original post to see it in action.
This port works in basically the same way but I've also added the ability to fly to routes (minus a few all water routes).
There is a flag (FLAG_EON_LATI) that you can set or clear to change between Latias and Latios.
If you have any suggestions let me know and please contribute if you want to, especially with adding in new music...
I was just looking at this the day before you posted! Great Work! Are you planning to polish this up further? If you planned to replace the default region map background, I wouldn't mind doing some art.
Just here to say this is brilliant, great job! Really excited to see the progress made on this, particularly sky battles. Sky trainer battles might be an interesting shout if you can get wilds working x