The franchise of Pokemon does not have crazy and mind blowing stories, but they do have great battle mechanics and cozy, wholesome gameplay to them.
I would love to see cohh trying Pokemon Ultra Moon again on stream and trying to proceed a bit further than the first few hours, which are known to be slow. (The game picks up faster after the first 2-3+- hours)
Just a cozy wholesome stream, and he can even get invested, potentially, in the competitive scene which is where its at - There is no end to the mechanics, strategies in online play - that's where you can get invested and get the wheels running.
Hope one day I will be able to see him play a full pokemon game, even if its not a top tier game for his own taste. I think it would be wholesome.