Title says it all ;D
I'd guess so. Normal (intially not Zapper or anything due to a certain signal that's missing) US NES controllers work fine, and I'd think they'd be no different, but PAL SNES controllers require modification, so I can't say for sure.
The non-Scandinavian PAL NES controllers you are talking about are said to work in NTSC NES so I don't see any reason that they would not work in AV Famicom.
The region protection is only one-sided. NTSC and Scandinavian PAL controllers won't work in these non-Scandinavian PAL NES consoles, but controllers from the mentioned system are supposedly universal.
Same goes for (all) PAL SNES controllers.
PAL controllers are compatible with everything they have inside 2 resistors , because the PAL NES have inside diodes on the controller ports, so American controllers will not work on PAL NES, but PAL controlers will work on American NES .
Yes that's what I meant to say.
Only that it doesn't apply to all PAL. Only those PAL NES consoles sold in certain countries like Germany have region-protected controller ports using diodes (there are at least 3 different types of PAL with various types of incompatibilities).
Nice, so I've more to choose from. Thank you all for your answers!