I always imagined a MST3K game like a 3-D platformer where you could play as either Joel, Mike, Jonah, and I guess the new lady for the new season that I haven't figured out how to watch yet. The bots would have shops or give you special skills when you ran across them. The levels would be based on bad movies that they are stuck in, and they'd make comments every once in a while as you play. Kind of like Gex 2, although that would probably get annoying.
This is probably as close as I'll get to an article about NGPC games.
http://www.gamerdad.com/blog/2021/04/02/neo-geo-pocket-color-selection-vol-1-switch/
My favorite NGPC games are SNK vs. Capcom: Card Fighters Clash and Gals Fighters.