Tracking for Non Game & Watch LCD Handhelds

Requesting tracking for handhelds, or retro home arcade/LCD systems, that aren't affiliated with Game & Watch. They range from seemingly bootleg offerings to some that boast some fairly custom body types and controls, or big IPs. I did notice that many of the Tiger electronics systems do have proper cataloging on the site, but I think these could be a value add and could help bring some of these systems out of obscurity while they are still around.

There are a number of these that can be highly collectible, and I've them all over the place in Japan in cases at Game shops. Some pictures of a few different ones below.

I feel like if not one category, there could be a category for Bandai, and Epoch at least as a start: as they seem to have made many of them. http://handheldempire.com/ seems to catalogue a number of them as well.