User blog comment:Mcgee1095/My guide NPC is stuck underground!! Help!!!/@comment-4085927-20111024060626/@comment-4085927-20111025065513

I haven't tried since the more recent updates but i know you use to be able to put him in caves and leave him there. I had him in one for ages. I've also dug holes under him and covered it with dirt, and he never came back. But i gather they changed this when the guide became useful.