Don't let people buy Megas.

This "Pokémon form conditions" system is obviously not done.  It's only
just done enough to, well, stop being from buying Megas.
Add evolution stuff for Kalos Pokémon.
Update Lightning Rod's name.
Clear the experience requirement for Rhydon to evolve.

I'm pretty sure it was only there in the first place because Rhydon was
in the old "group two" or whatever for evolving and Negrek set the
experience column automatically based on that.  See also: Froslass
(which I already fixed).