There is in fact a PSP emulator on the Pi 2, it's included as part of an image called Happi Game Center. The image is a little more heavier on resources which increases its range of emulation. It also has Raspbian and Kodi integrated into it. There's a video at this link: https://www.youtube.com/watch?v=qwtffTKyG1o
The creator plans to add Sega Naomi and Sega Dreamcast support sometime soon as well
I like lego. End of story.