Good Half-Team,I'll just Tie up the loose ends.
Sylveon needs major change.here's the set I have in mind.
EV:252 SDef / 252 SpAtk. / 4 Spd.
Moonblast is just for STAB (same type attack bonus) Shadow ball and bite for an unsuspected attack and Protect for a little healing time with that leftovers.
Charizard has Charizardite X.You have Y.This can't be done.So here's a common Charizard mega setup.
[email protected] Y
EV: 252 Atk. / 252 Spd. / 4 SpAtk.
Flare blitz is very good STAB here,plus you got Dragon dance to get you all beefy and then Solar beam for unlucky water types and Dragon claw for dragon-busting.
All your Aegislash needs is a Weakness policy,Which can be bought at the Battle maison in Kiloude city for 48 Bp.
That's about it,hope this helps.