I like mewtwo better, but I value my mew more highly. When I decided to catch every pokemon to complete my save in emerald (don't do this, all you get is a stupid picture from the guy who claims to be a dev) I had missed out on all the events, leaving me in an interesting state for mew and deoxys. You can get the rest from other games and two bonus discs. I ended up cheating them in the first time, but later decided I wanted to get these last two without resorting to action replay codes. 4 emerald save files on my secondary cart, a couple hundred cloning glitches, many hours, and 6 glitzer popping attempts later, and I had done it. If you're considering doing this, don't. Just cheat the thing in. It's better that way.