Mew actually CAN be found in the Red and Blue games, without hacking, without cheating, and without going to a tournament. It's convoluted, and doesn't sound like it would even work, but I've tested it. I couldn't believe it worked.
www.gametrailers.com/video/episode-7-pop-fiction/706469
EDIT When Red and Blue came out, me and my older brother had opposite copies, (I had Blue and he had Red.) so we helped propel each other to being Pokemon masters. At the time, we had no idea about the way to get Mew back then, so we chalked him up to Pokemon we CAN'T get. We were little kids back then, and our parents wouldn't take us to the only tournament in the city that ever happened. So, when you can't go to a tournament, I think you can still be considered a Pokemon master, because it's unfair. There was only ever ONE tournament that was anywhere near my home back then.