Mega Ampharos

One of only two Electric Type Mega Evolutions in the game, Mega Ampharos is the weaker option in terms of DPS, but generally has a higher TDO to make up for it, especially when its Dragon sub-type resists the opposing Pokemon. As a Dragon Type attacker, it's... not good. Just stick with Mega Charizard X.

Best PvE Offensive Moveset

• Volt Switch outperforms Charge Beam on paper, but the latter is easier to dodge with. 
• Zap Cannon is the charge move of choice, doing far more damage for the same amount of energy as Thunder.
• Thunder Punch deals less damage per hit, but as a 3-bar move is more consistent and is a good option for a 2nd charge move. 
• Dragon Pulse can't deal Super Effective damage alongside Mega Ampharos' Electric Type fast moves, leaving it in the dust despite STAB.
• Focus Blast, Power Gem, Trailblaze and Return are worthless on Mega Ampharos.