Mega Medicham plays the role of a wall breaker better than a sweeper. Replace Drain Punch and Psycho Cut for High Jump Kick and Zen Headbutt, respectively. Yes, I'm aware of their accuracy issues, but Megacham needs the extra power to muscle past threats, especially with an Adamant nature.
A physically defensive spread is better for Zapdos, because Talonflame rips through Chesnaught and Medicham very easily: 252 HP/168 Def/68 SAtk/20 Spe. This spread always KOs Mega Pinsir with Thunderbolt, outruns Hasty/Naive Aegislash and does better against physical threats. If you still want some special defensive investment, 252 HP/64 Def/176 SDef/16 Spe with Calm is the better spread to use; it still helps against Mega Pinsir and Talonflame.
244 HP gives Gliscor a Poison Heal number. The remaining 8 EVs can be either moved to Defense or Speed.
4 HP/252 Def/252 SDef is the better spread for Chansey. Its HP is already high enough, so why not give its special bulk some help?
Other than those changes, this team looks good.
O ♥♥♥♥ I knew I missed something, I was copying the team from the computer to the tab and just clicked on the ev sets ps offers ;( I have defensive zapdos tho, mainly cause pinsir and talonflame lol.
Also hmm the reason why I invested ev in hp for chansey was to stay on logger but fair point.
Also I just realised I am extremely weak to set up clefable :( any suggestions for clefable and azu?