Quoted By:
Mega Nidoking
Type Poison/Steel
Ability: Sheer Force
HP: 81
Atk: 122 (+20)
Def: 97 (+20)
Sp. Atk: 115 (+30)
Sp. Def: 95 (+20)
Spd: 95 (+10)
The idea around a Mega I feel should be to bring out a Pokemon's strengths that they are lacking (Unless you just completely redo them ala Charizard X) and Nidoking needs nothing more then an increase to his attack and defense, Sheer Force is an already amazing ability and giving it to the mega would make the most sense, I would change it's typing to steel for one Poison/Steel would be a new typing and give him a good chunk of resistances while giving him new weaknesses in exchange for loosing some old ones and gaining the steel typing standard resistance pool
His x4 weakness to Earthquake I feel would keep him in check but not stop him and his stat spread I feel keeps to Nidokings design as a mixed attacker