Yes, this is real. I'm talking about lucid dreaming, a technique that allows you to be consiously aware that you are dreaming while you are asleep, and gives you the ability to control your dreams. However, you percieve whatever you dream up as real. For instance, if you imagined a goat falling from the sky, a goat would fall from the sky right before your eyes. It feels extremely close to real (so I've been told. It's really freaking difficult to accomplish. I said close to real because our minds can't make a flawless world, and things will feel slightly synthetic.) It is a scientifically documented fact, and there is no doubt that it is real. There are tons of people who are experts at it, and anyone can do it (in fact, a good friend of mine achieves lucid dreaming nightly). If you don't believe me, then read this: http://en.wikipedia.org/wiki/Lucid_dreaming
Anyway, couldn't this be used to "reach" the Pokemon world in your mind? Like, you could imagine yourself in the world of Pokemon, and you would percieve yourself as being there, with all five senses! You could be a Pokemon trainer and everything, and it would seem real to you! Unfortunately, this is extremely difficult to achieve, and would probably require months of practice just to achieve it. Still, to have the experience of being a Pokemon trainer is worth it, am I right?!