Not going to lie, I don't have a clue what it is, but it's featuring some awesome Pokemon whom hold a very special place in my heart. I've taken it to a comic seller and he told me I should be selling it for $100+ so that's what I'm listing it at! I've had a lot of people look online for it and no one could find it, either.
 
After some more research, we've concluded: Pocket Monster History Note VOl. 1. 2. &3. (GSC, RS, FRLG) Encyclopedia Sold by Showa Note and Published By Tommy Co.