Super interesting. Ran a similar (but different) colorized version on Batocera (Pokemon Blue colorized, vanilla, so same Gen. 1 sprites, but colorized) and the save is also a .srm file. I'll play until I can catch a Pidgey or something, throw it in the box, then upload the save here. From here, we can see if it's possible to take said .srm file, make sure it's legal (via PKHeX, maybe?), and then inject THAT save onto my modded N3DS to see if it takes in the injected same vanilla-colorized-Gen. 1 sprites version of Blue.
And THEN we'll see if we can them into Transporter!
Lots of work, but I want to see if I can at least have a living 'Dex of Gen. 1 and Gen. 2. Weird, 30s goals, I guess.