Groudon is fine, since he's weak after waking up from his nap.

And yeah, Mewtwo is right out, Genesect [i]might[/i] be available as something like [url=http://puu.sh/dwp1c/596d642ef9.png]this[/url], but it's doubtful that anyone would be able to form an alliance with a prehistoric killing machine. Deoxys, as far as I know, didn't exactly need science to form, as it's just an alien space virus. Feel free to correct me.