Flygon? thought about that too, but I have no ideas yet.
However I just made another Mega:
Mega Drifblim (<- clix me)
I basicly gave it the Wailord buddy, recolored, added clouds and some more patches to make give it a depressing look.
The patches also indicate how I thought what his stats could be: A wall. Eventhoug normal Drifblim is somewhat of special sweeper, I think his movepool is really good for a support or staller. Hes got Stockpile, Phantom Force, Hex, Amnesia, Calm mind, charge beam, will-o-wisp, magic coat, pain split, thunder wave and even tailwind so he could easily be a decent staller or support if he had the right stats.
So here are my stats:
Type: Ghost/Flying
Abbility: Oppressing Presence - Every round the enemy doesnt damage Drifblim with a direct attack it looses 12% of its maximum health (same damage as burn and poison).
Stats:- | HP | Atk | Def | SpA | SpD | Spe | total |
Normal | 150 | 80 | 44 | 90 | 54 | 80 | 498 |
Mega | 180 | 85 | 90 | 95 | 100 | 60 | 600 |