Hi, there is already an existing request from a while back, but it only gained a couple of votes. Perhaps @MP_Mod can combine these threads.
I was playing around with the Plini X plug-in recently and discovered that I love the Plini Octaver. I think it’s a bit more subtle than most of the other pitch shifting blocks. Turn the Direct Level knob all the way up, the Down knob all the way down, and dial the Up knob to taste (about 10:00 to 2:00). Add a light amount of chorus or detune after that and the result can at least get you in the ballpark of a 12-string emulation.
*For other folks reading this, I am not interested in the So I have to buy a plug-in to do this? discussion (you do not have to), nor the arguments over pitch-shifting artifacts.