Hey all!
I didn't have time to read EVERYTHING above, but I wanted to weigh in on this exciting conversation!
I am currently editing a video for our Pokemon Project on YouTube (EveryGameEver) and I recently had a long conversation with Nintendo rep Jeremy Hepworth on this topic!
He agrees that there is not any sort of SGB/2 SNES inside. Rather, it is proprietary software with a modified GB link cable that distributes the Mew to your game if you have an empty party slot. The SNES controller was simple the joystick used for the machine. He said there was no cartridge inside the Mew machines either, and that they were overall slightly smaller than the Arcade1Up tabletops you find in stores.
I of course asked where Nintendo buried them, he said they are most definitely in a storage warehouse collecting dust lol.
I just thought I would share this awesome conversation I got to have with him. Look for my vid next week!
- Cody