Originally Posted by Judge Dredd
how soon can you access the dream world ?
Honestly not sure of the earliest time it can be done, however, when you are in the third city to get the third gym badge, people are talking about the Dream World, so that is when I attempted to do so my first time.
I would guess you can do it when you get the C-Gear though. You get the C-Gear before you even get your first badge.