Originally Posted by mistdragon
You should be proud to have a Shiny one. Maybe the person who gave it to you was part of the Nintendo Specials event and was one of the few earliest to arrive and thus, recieved the Shiny Mew.
My guess is that it is a sharked Mew, that is the most common kind. If he got it without cheating though, that would be awesome.....a Mew AND a shiny.......