@Efriim
Harvest Moon Innocent Life works. A youtube kid showed me how changing the PSP CPU Clock to 80 will get the game to load normally and not freeze on the island intro.
System > Change emulated PSP's CPU clock = 80
Harvest Moon Hero of Leaf Valley plays really well.
Graphics > Mode = Buffered rendering
Graphics > Simulate block transfer effects = False
I couldn't get Wagic the Homebrew to work, not quite. The thing was kind of buggy on real PSP. There are quite a few versions, I didn't over exert myself trying to get all the assets to load without crashing, but it does start.
I got Monster Hunter 3rd to play fairly well there are some minor slow downs like in the center of town. Like the other games, they can be played in non-buffered mode, and disable software skinning. Enable hardware transform and vertex cache. The first two games get better performance, overclock is recommended. 3rd has an english patch that is non-HD that and works for ppsspp.
Graphics > Software skinning = False
Kingdom of Paradise/Heaven plays fine.
