Hello,PSP has no Unity support which PSVita has (In fact they were a pluggin for older fimwares wich allow create homebrew app/games using Unity.it was deleted by Sony because it was a door for real homebrew scene)
https://blogs.unity3d.com/es/2014/01/15/playstatio...
Also the New 3ds (and Wii U) has unity support
https://unity3d.com/company/public-relations/ne...
and you can use the full SDK freely:
https://developer.nintendo.com/