>>22639495Mega Medicham doesn't get Close Combat.
All it has over Gallade is immediate power, which is patched up easily by Gallade's Swords Dance. And Gallade gets the most spammable move in the game right now, Knock Off. Hell, Gallade has such solid neutral coverage with STABs and Knock Off that it can run other moves in the fourth slot like Skill Swap for fucking over Mega Sableye or Will-o-wisp.
There's just no reason to use Mega Medicham over Mega Gallade, other than personal preference.