Only psychotically obsessive Mew and Mewtwo fans should pass beyond this point. Some of this might seem a bit crazy to those not truly psycho about these psychic cats. But then again, you are at this site... (as a disclaimer, none of these below sites are owned or connected to me in anyway whatsoever.)

Mewtwo Beadie Buddy | Mew Beadie Buddy Need beads, string, and keyring
Beadie Buddies are things made by threading beads through alternating halves of string. Its difficult to explain the process, but if you know how, these patterns are great if you want a handmade keychain of Mew and/or Mewtwo.

Mew and Mewtwo Stationary Free, just download and print
This Japanese site offers rather professional-looking stationary of several Pokemon, including a Mew theme and a Mewtwo theme. You can print all the letters and envelopes you want! Only thing is people in Japan seem to put the stamp on the opposite side of the envelope...oh well...

Mewtwo Craft | Mew Craft Free, minus the toilet paper
These crafts involve gluing pre-drawn body parts onto toilet paper tubes. Kinda cheesy, but, oh well. It IS Mew and Mewtwo.