Which Mega - Evolved Pokemon have the overall highest Sp. Attack?

Question

Knowing some of the stats increase when a Pokemon mega evolves, which ones have the highest Sp. Attack?

Answer 1

Mega Mewtwo Y has the highest Sp.Attack out of all the mega evolutions with 194 base Sp.Attack, followed up by mega Alakazam with 175 base Sp. Attack.

Comments

Thanks,  Terlor!