So, I tried Platinum Red. I played it on MyBoy on Android so I'll provide you some feedback
Alpha Version : 1.3
Android Version : 5.0
MyBoy! Version : 1.6.2
The game ran relatively smoothly. I believe there was a minor speed decrease (it ran at about 92-95% ). The known glitch of Sandgem's PokeCenter during the tour is still there. The music was trembling a bit from time to time. Also noticed some fps drops occasionally. MyBoy!'s features seem to work (I tried x2 and x4 speed but noticed fps drop, save/load state work as intended).
Not really sure if this helps, but seeing the amount of effort you're putting for this, I couldn't help but try to be of use :P
Keep up the good work!!
Merry Christmas to you too !! (Even tho a bit late)
Edit : My phone keeps posting twice, I'll keep deleting lol
There's no need for you to try to be of some use. You pointed out things she's already aware of, and you didn't need to say the alpha and Android version. And the frame drops might be because of MyBoy tbh. I used VBA and didn't have frame drops, so idk. But trust me, GoGo's got this.