I have played with Mega Pidgeot for the last couple months (really, I think all of my recents teams had Mega Pidgeot in there, I got totally lost when suspect ladder came out lol), with what I think were every set this bird had. I like to play any style that is not called stall, but I really enjoy Balance buildings, and I also fuckin love mono Flying coverage, so ever since I started playing with Mega Pidgeot I dropped Heat Wave for any other move. I realized I really don't need that fire coverage if I could let my team mates deal with opposing Mega Pidgeot checks. So I got to imo the most consistent set Mega Pidgeot could have:
Pidgeot-Mega @ Pidgeotite
Ability: No Guard
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Hurricane
- U-turn
- Roost
- Work Up/Defog/Protect
This set put imense pressure against balance builds. Hurricane/U-turn/Roost are mandatory. Even with hax chances, as a good player that I crave to be, I realized it was dumb to rely in 30% chances, and then 50/50 to break my suppose checks, so U-turn were necessary to lure in my checks for something else. Roost is also needed for recovery, since I really wants to keep healthy enough to pack some priorities like Mamo's Ice Shard or Entei/Lucario Espeed, which doesn't kill me if at full health. The 4th slot can be customized for my team needs. I really enjoy U-turn/Work Up actually, since it lets Bird Jesus to act as an offensive pivot and late game sweeper. I could Defog in obviously switchs, but usually I found more interesting to spam Hurricane or keep my momentum. Protect is actually a nice anti lead move and have a good matchup against offense, choiced mons and Mienshao. I remember once when I stopped a Hitmonlee from sweeping me after blockin' his Fake Out and Normal Gem use. Cool move.
So, even with Heat Wave there were much things, like Mega Aggron and Empoleon, that wasn't close to 3HKO it, and most Forrys get 2HKO by Hurricane anyway so, yea, I'd say that if you want to use Mega Pidgeot at his finest, do not use Heat Wave.
First, I thought about every "consistent" checks Jesus had in this tier, essentially anything that could take at least three hits to be KOed, or that could beat me one on one, if I don't Work Up. That was important because I really didn't want to Work Up early or mid game that much, specially if my counters were healthy and still around. So, the checks were, shaky or not: Mega-Aerodactyl, Blissey, Snorlax, Mega Ampharos, Rotom-H, Porygon2, Cresselia, Empoleon, Florges, Mega-Aggron, SpDef Bronzong, Magneton, Rhyperior, SpDef Vaporeon, SpDef Umbreon, SpDef Forretress, Mandibuzz, Doublade, AV Reuniclus, AV Goodra, Tyrantrum and I think that was it. About ~20 mons that could somewhat "check" Mega Pidgeot. One could say "oh so there were plenty of choices to be used against Pidgeot!" but almost every check Mega Pidgeot have are Steel, fat Normal, fat Dark or fat Psychic type mon. I came to the conclusion that any fighting type gives M-Pidgeot check's troubles, expect maybe Mega Aerodactyl if you are not a scarf user.
From then, I just had to build around it. A few weeks ago I got by my first time in #3 with a Mega Pidgeot team consisting of M-Pidgeot/Entei/Heracross/Salamence/Cresselia/Empoleon (I should RMT it any time soon lol). From my experiences, I realized M-Pidgeot has a poor matchup against offense, really. This playstyle has no trouble whatsoever to deal with M-Pidgeot, since M-Pidgeot fails to OHKO any decent mon unless grass/bug type, and doesn't have bulk enough to survive commom STABs. Stall also have no trouble at all dealing with M-Pidgeot unless Work Up/Refresh, and even then I'm not so sure it gives stall troubles (T-Wave Blissey has a much higher chance to win I guess). So yeah, if you are playing balance with Mega Pidgeot you need partners to take care of those playstyles, bc Mega Pidgey ain't doing too much. But, again, I guess this is also part of any teambuild process lol.
Although I was carrying a hard and a soft check for M-Pidgeot in my team with a Empoleon/Cresselia core, I didn't use those two because of Almighty Bird Jesus. Cresselia had a great matchup against offense, spreading twave like a goddess and Empoleon gives me much needed utility in hazard control, while phazing (most) attempts to setup and sweep me. Those two just happened to also works great against opposing M-Pidgeys.
Right now I'm just sharing my personal experiences with and against M-Pidgeot over ladder with you guys. I can see why it could be a broken because 15% or 50% of the time it breaks thru suppose checks, but I can't say it overcentralize the meta. For me, that simply untrue, since all M-Pidgeot answers are usable, effective at their roles and can give their teams support outside M-Pidgeot, while no play style gets torn apart with it around. That's essentially different from Serperior or Victini suspects, since both could gives much more trouble to balance and stall buildings than M-Pidgeot could ever done.
I still don't know if Mega-Pidgeot are ban material or not, and I aim to find this out with this suspect, but I hope this post contribute to the discussion after so many bad posts were made, that really doesn't contribute to this thread at all.