Aerial Ace has a niche on Dragonite is that receives STAB and is a good move to deal with MVenusaur, keldeo, Conkeldurr without "locking" but hasn't got relevant coverage to Dragon STAB.-Aerial Ace Dragonite
-Fly
-There's a special case where Fly is "usable competitevely", M-Aerodactyl. Why? Because it has no good BP Power Flying move and his main STAB (Stone Edge) is not boosted by Tough Claws, while Fly does.
The set is (more UU than OU; though)
Aerodactyl @ Aerodactylite
Ability: Pressure > Tough Claws
4 HP/252 Atk/252 Spe
Adamant Nature
-Stone Edge.
-Earthquake
-Fly
-Crunch/Hone Claws.
Even though it's silly, I can consider it understandable: Thunder Wave a Rotom (I suppose Rotom-W). The user was used to the pre-Gen VI effect of paralysis.
HP Ice is not used on MCharizard Y because is pitful weak.
Close Combat+Focus Blast+Facade+Aqua Jet Keldeo.
One of the moves is usable in the "free" fourth slot of Keldeo, you know what. The rest are still pure crap.
Mega Charizard Y, with Flamethrower... and Dragon Dance. The combination is usable. Flamethrower is viable (100% accuracy), Dragon Dance has a niche because boost key speed tiers.
Greninja with Night Slash is usable and Extremespeed Linnone is mandatory.
About the rest that i have shown, it's really silly. What is next?