Anbernic handheld consoles are awesome and inexpensive.
I recommend the RG35XXSP. It’s shaped like a Gameboy Advance SP and plays lots of Dreamcast & N64 games plus everything below that.
$60 + Shipping Directly from Anbernic
or
$90 with free 1 or 2 day shipping from Amazon
I just want micro SD and removable batteries again.