Is there supposed to be a cable for the 3DS version of Giants? There wasn't one in my non-portal owners starter kit, and I see that there's a port on the portal to plug in a microUSB cable.
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BAZINGA! A neutron walks into a bar and asks how much for a drink. The bartender replies 'For you, no charge'.
I'm not crazy, my mother had me tested
Yeah, the portals from both 3DS versions (S:SA and Giants) are the same - they both use InfraRed for the 3DS and the USB port for the PC (or on the Wii, maybe PS3/360... dunno) - but the Giants bundle cheaped out and didn't include the cable. It's a pretty standard Mini-USB cable though, so you shouldn't have a problem getting it if you really need it.