Hi there. I'm a friend of Alex. Say, I remember Pokemon anime and the games. I have four Pokemon games on my 3DS. But I love Pokemon moon and ultra moon mostly.
Not sure about other models of Pi4 but the Pi 4 B with 8GBs OCed to 2Ghz handles PSP really great except like 1 game I found and it is playable it just looks bad lol Motor Storm Arctic something or other.