Gonna go a little off-topic and talk about mah boi Mega-Medicham.
Essentially, it lost several of its biggest offensive checks in Talonflame, Mega Pinsir, and Aegislash, making it a lot easier to use and
much more effective. Its Substitute set is as deadly as ever; set up a sub on a defensive mon, and you're ready to start tearing apart teams with your coverage.
Medicham @ Medichamite
Ability: Pure Power
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- High Jump Kick
- Zen Headbutt
- Poison Jab / Fire Punch
- Substitute
High Jump Kick is much more spammable now due to the two main OU ghosts (Aegislash and Jellicent) being locked away in A rank. Zen Headbutt is dat secondary STAB. Poison Jab might seem a bit odd, but:
252 Atk Pure Power Medicham Poison Jab vs. 4 HP / 0 Def Mega Gardevoir: 304-358 (109.3 - 128.7%) -- guaranteed OHKO
this calc actually means that Mega-Gard
can't even check you on the turn it mega evolves, which allows you to keep on rekking with Medicham. Fire Punch is also a pretty legit option since it roasts Scizor. There are actually plenty of decent coverage options (Drain Punch to regain health after Sub, Thunder Punch for Gyara and Slowbro, Bullet Punch bc prio, etc..) that can go in that slot; it's up to you. The real selling point of the set is Substitute, which devastates opposing teams if you set it up as the opponent switches out.
So we have all kinda figured out Mega Gardevoir and Mega Megacham do work in this meta, so I'm gonna introduce a really cool offensive check to BOTH
Crobat @ Choice Band
Ability: Infiltrator
EVs: 252 Atk / 252 Spd / 4 SDef
Jolly Nature
- Brave Bird
- Cross Poison
- U-turn
- Sleep Talk
If you take a look at the current OU viability rankings, you'll notice a lot of the best Flying-type checks, as well as the birds themselves, are in the higher ranks. So what takes over as the next best flying type? Some would argue it's Staraptor's time to shine, but I'm gonna hype CROBAT instead for one reason: Infiltrator. With this ability, it'll bypass Substitute, making it one of the best offensive checks to Mega-Cham in the metagame. Take a look at this damage output:
252 Atk Choice Band Crobat Brave Bird vs. 4 HP / 0 Def Mega Gardevoir: 324-382 (116.5 - 137.4%) -- guaranteed OHKO <-- DED
252 Atk Choice Band Crobat Brave Bird vs. 4 HP / 0 Def Mega Medicham: 524-618 (200 - 235.8%) -- guaranteed OHKO <-- you just killed it TWICE
252 Atk Choice Band Crobat Brave Bird vs. -6 0 HP / 0- Def Sewaddle: 5512-6492 (2386.1 - 2810.3%) -- guaranteed OHKO
So if you want a solid check to the top 2 megas, or you just wanna spam Brave Bird a la Talonflame, give BandBat a try.