I would prefer to max out a Jolteon with Thunder Shock / Thunderbold than your Ampharos.
It's a good trophy, tho. Save him in case of a future rebalance.
Up
0
Down
One does not waste dust on Jolteons. Just Catch a bunch of 70-80 IV evees with high CP. Evolve and you got yourself an army of decent Electric attackers without using any dust.
Best defense i would say focus blast to deal with Rhydon, Tyranitar, Snorlax,