I was mostly speaking of the ones you guys dumped/emulated since this thread has started which has been quite a few already I know I've lost count, so yeah I guess that would fall in every handheld games with an MCU since this doesn't seem to be limited to only TMS-09xx/1xxx any longer.
Game & Watch games with an MCU? Now that's something completely new to me, not that I'm very familiar with them, but always thought they all used discrete logic like most similar LCD based handhelds. Madrigal Game & Watch simulators are very decent especially the new versions, but if there is an MCU involved emulation would be far more interesting. These games are pretty expensive though so it wouldn't be something cheap that's for sure.
Bookmarked that link to read later, seems like an interesting one thanks for posting.