Kinda thought that myself XD. 'Twas fine while it lasted! :D
but anyway, while I did hear that off of Bulbapedia, I think there could be some truth to it (only my opinion, though, so don't eat me or anything). For one, there is the FRLG soundtrack. Then, there's the FRLG Gym Badges, as well as the Hoenn Gym badges, (can be found in unLZ). There's the item sprites in the bag, the whole Multiplayer/Union Room thing (as you mentioned), the same Trainer Tower system, etc. While it did leave plenty of FR stuff out, there's also a lot there. There's no real reason to have inserted the entire FRLG soundtrack- surely they wouldn't have even contemplated including Kanto, due to it's availability in FRLG. And, to go back earlier in our conversation, maps can easily be saved and inserted with A-Map, and with Nintendo's (what I imagine would be a) Super-A-Map, it'd take a matter of minutes to place all of those maps and scripts in. However, I know that the only reason for them to make 3rd Sisters like Platinum and Emerald is money, but I don't think they'd want to just copy-paste from Ruby, so even then they could have easily remapped the areas. Although, one (of plenty) contradictions is that Emerald has only RSE trainer sprites, while FRLG has its own, plus the RS trainer sprites. Also, there's the Kanto Pokemon sprites, as you said. I don't really know ^^'
Anyway, how's Saga going? Have you made much progress since y/our [/kinda] discovery? (I say "kinda" because you actually solved it... But I had a good inkling with the whole repointing thing, I guess :P) BUT saying that still makes me feel like a douc#e, so.. Yeah. But anyway, Saga?
:D