Recently, a glitch to obtain Mew, was found. Many very
low-traffic sites which are widely unknown had obtained this
strange way to get Mew. How it was discovered? Nobody knows at
the time, being as that it is such an obscure glitch.
My theory is that a worker at Game Freak, who has some
part in creating or fixing this game, at tweaked it, so
this strange glitch could be possible. Along with that
theory, I think that worker, or someone who knew, put it
on a random low-traffic site, after a few years, seeing
how it would spread. Well, it spread all right. Right
to GameFAQs, after I found it. The glitch not only works
for Mew, it also works for everything else.