Separate names with a comma.
No, it isn't. The color depends on the substance that is burning and isn't really an indicator of hotness.
Power Herb Geomancy!
Allow Icy Wind
Disallow Volt Switch
Rattled/Prankster is very interesting!
Normal / Fighting
I think Normal/Fighting is the way to go. We also have precedents whose primary typing changes with evolution (Onix/Steelix and Swablu/Altaria).