Wonder Trade is actually really cool when you start breeding. Then you can just send all of your failed clones to Wonder Trade. It's a great way to get the other starter pokemon (Because other people do the same thing) without having to contort to the demands of all the 6 year olds on GTS who want Mews and Rayquazas for Charmanders.
I've been spamming it for the last hour with Squirtles, Hitmonlees and Grimers. Got a lot of Pokemon that I hadn't caught yet. Notable ones I got are Torchic, Bulbasaur, Honedge, Froakie, Smeargle, Eevee, Absol and Clampearl
Perhaps I should find a ditto first...