User blog comment:AsculaRiddle/i didn't know where to talk about theories so I'll put it here/@comment-30187068-20170727155835

I own my own copy of Journal 3 (Brag: Special Edition), and he incountered a group of interdimensional refugees hiding inside an asteroid while he was hiding from Bill. They gave him a dimensional translator (kinda like Rick's portal gun, but less cool) and he used in to travel the multiverse and build the quantum distablizer, along with the help of fiddleford from another dimension. So out of the thirty years he was traveling the multiverse, he spent about an hour and a half in the nightmare realm.