I've been playing my Wonderswan a lot lately. This is an older photo, but I have a backlight mod and it's not a system people seem to post about much, but it's a great little system. The Tate mode aspect of it is really unique too.
The Analogue Pocket has a Super Gameboy FPGA core! You can play classic Gameboy games with the special borders that the SGB adds. I love this little thing!
Anyone into Retro Handhelds? I've been really enjoying the Anbernic 353VS lately. I mostly bought it to have a more pocket sized 351V.