Staring at Yellow: transfer to Gold, transfer to Emerald, and then get it in pal park in soulsilver, and maybe even to White1/2? Is it possible if you do it one by one? Also, will it destroy the game since Mew is from a glitch?
No unfortunately due to a massive overhaul in game mechanics it is impossible to transfer Pokemon from generation two to generation three. However you may transfer your Mew to Pokemon Gold, or transfer the Mew available in Emerald to Soulsilver and then two White or White 2, but it is impossible to transfer your mew from yellow to white 2. Sorry