My bad, you're right - Metroid Fusion was indeed on the GBA. I was playing Prince of Persia 1 on the Genesis - there's a ROM hack for it which fixes all the issues with the port and makes it behave pretty much like the OG DOS version, with the added graphics of the Genesis version of course.

Sadly the Miyoo is a bit underspecced for the N64 and Gen 6 consoles, so the PS1 is the highest it can emulate. For newer consoles, you'd be looking at something like the Retroid Pocket 3+ or the upcoming Anbernic RG405V, but of course, they're bigger and more expensive. The main reason I prefer the Miyoo is because of how lightweight it is, which allows me to game for hours if I felt like it, and it's size makes it easy to carry around too. But I guess it won't be long before we get to see a future Miyoo, or an alternative in the same form-factor, having the specs to emulate m Gen 6 consoles.