I'd be interested in this as well. There's some additional things save editing can do. Mystery GIFT is one. Wonder Cards and Wonder News could be gotten or edited. Plus, wireless events could be enabled. I've asked around before if anyone had a game save that had an unclaimed ticket on it (to study), but I had no luck finding one. Lastly, there is some house that has custom trainer battle.
Editing pokémon in GBA using the save would be nice. There was a program by Filb.de called Pokémon Reader that could read pokémon save files for Pokémon Ruby, Sapphire, FireRed, LeafGreen, and Emerald of all languages, and display all the pokémon in the PC boxes. It has quite a nice graphical look, too. However, it can only view the data. It does not do any modification (and the creator expressed he does not want to do that). Still, this may help to gather information that will be of use here.
http://www.filb.de/games/tools
Editing pokémon in GBA using the save would be nice. There was a program by Filb.de called Pokémon Reader that could read pokémon save files for Pokémon Ruby, Sapphire, FireRed, LeafGreen, and Emerald of all languages, and display all the pokémon in the PC boxes. It has quite a nice graphical look, too. However, it can only view the data. It does not do any modification (and the creator expressed he does not want to do that). Still, this may help to gather information that will be of use here.
http://www.filb.de/games/tools