Give me a reason to power up my 100% Donphan
I hatched a perfect Panphy and immediately evolved it into a level 20 Counter/Earthquake Donphan. The obvious reason to power it up is "because I want to" or "just for fun", and those reasons may be good enough. However, I'm interested in the best in game uses for Donphan. TMs are obviously rare, but I'd consider move changes. Also consider that I live in America where Raikou has already come and gone. Thank you for the help!
Answers
The best reason to power up a Donphan with that move set is to create an aura of confusion in gyms. Trainers will look at this 2590 Donphan and go "What?" for long enough for you to gain 1 extra coin when the server goes "Screw you - you're wasting my time, I'm going to give you a Network Error until you make up your mind."
You'll be able to get a full 50 coins out of this over the lifetime of the game, so POWER IT UP! POWER IT UP! POWER TO THE DONPHAN!
With Gen III on the horizon I would power him up for potential counter for Regirock and Registeel (which will probably be available as raid bosses at some point).
Main reason is that the both moves are gonna be super effective against them (I also think legendary beasts will make return like the birds did - three at once he would be great agains Raikou) I don't think his moveset is going to change though since there is not much ground type moves he can learn naturally.