The only systems I can think about for PAL games are de Retro Duo and the Super Retro Trio. I know that you can split the NES ans SNES boards to make them standalone consoles with the Duo. I don't know about the Trio but I'm pretty sure that it is possible too. I'm not sure if the compatiblility...
Wow! I didn't expect some clear answer anytime soon! Thanks for your help guys!
@bentomo I'm sure the information you know could be useful for the Mega-Sticky!
To be clear, I'm looking for an expansion pak with a smaller board or that could be trimmed more than the official one. It's could be an interesting alternative for a N64p. If anyone knows, be sure to let me know. Thanks!