Not even all of Mexico, the first city I put in had High Plains. Ew. Haha. Some parts of Africa have it, too, I think. :3
Honestly, I could really use a Dusk Stone or a Moon Stone -- or any of the Pokemon that evolve that way. I haven't used any of mine yet, so I still need all of those evolutions (Honchkrow, Mismagius, Chandelure, Aegislash; Nidoqueen/King, Wigglytuff, Clefable, Delcatty, and Musharna). That's really all I'm missing from my Dex, are incredibly-hard-to-find stone evolutions. {XD}
Fingers crossed that you have any of those pokes sitting around BUT - I completely understand if that's asking too much, and I will try to dig through my Dex to find an alternative if need be. Just lemme know. :)