https://pokepast.es/5731535e9b78fc1d
Mega Altaria for Megas in NatDex OU.
This is somewhat of a new take on Mega Altaria. We have Adamant for decent power. Enough Speed to outspeed base 125s at +1 and Max HP.
Max HP allows you to get quite bulky because Altaria has high defenses + middling HP. We also run Cloud Nine to wall Zard Y early game. You are also able to shrug off Barra and Kingdra on rain. With this you are not just behold into sweeping. You can give much needed defensive utility early game. Your gameplan is to remove steels and Poisons for Altaria sweep and team is built for that.
Firstly we have Slowking G mixed Def with Rocky Helmet, Ice Beam. This gives us an extremely good pivot, Lando T weakener, Future Sight breaking capability, one of the best poison answers in the game. Because of our investment on both sides, you won't be able to play it brainlessly. You will have to double him in a couple times because he does get chipped with this spread but at high healths he is super nice.
Next up we have Fini. CM Surf Draining Kiss Sub. Sub is really cool on her because people don't expect it. They think that Mola walls her for life and they wait for Misty to wear off and then try to toxic. Even in general you can Sub on Mola Flip Turn, Uturn Corvi etc and get a strong hit on the guy they will be forced to send in. Misty is extremely nice with Alt because people really rely on Toxicing her. Fini is such a cracked version of Prima. People stopped using her in NatDex due to Mola uprising but it's super nice with set and preys on those very teams that rely on Mola for everything.
Next up we have Gliscor SD Facade EQ. Facade I really like in NatDex because Knock is only for for Balloon Ghold but have Treads. Glis heavily weakenes all Altaria checks like Mola, Corvi, Lando T,etc. If team is too defensive then Gliscor and Fini can take over, if team is too offensive Altaria can sweep with DDance.
Treads with Rocks Spin Knock. Outspeeds Lele and rest in SpDef and HP.
Lastly we have Z Fight Zama. This guy is a nice lure. CC into Z Fight OHKOes Corvi, Mola, M Sciz etc. so acts as another lure with M Altaria. Had Future Sight support to break particularly fat cores that even setup Gliscor and setup Fini struggle with. Is only speed control.