I'm not sure about this, but perhaps gen 5 games assume DSPh/DS Lite settings when inside 3DS, due to the 3ds possibly only looking at the setup screen as it appears on DSPh/DS Lite when in "DS Mode", meaning no WPA connectivity possible there(?), but if you try connecting to any compatible WPA on DSi/DS XL, rather than 3DS, then perhaps WPA will work w/ Gen 5...
As for Wii, are you using WPA2-PSK(TKIP)? Perhaps some other WPA security mode like WPA1-PSK(TKIP), or even WPA(1 or 2)-PSK(AES) will work better w/ Wii, although WPA is more designed for business settings rather than for gaming, so you could always try WEP...
Last edited by gregjammer; 22nd March 2013 at 4:54 PM.
My D/P FC: 4255-0421-2254
My Pt FC: 2450-0507-5436(old)
My HG FC:3524-8966-7093(old)
My black FC: 0691-4324-8351
My black 2 FC: 3440-0907-8860
My Y FC: 4038-6458-7352