Strongest Mega in OR/AS?

I can see Mega Beedrill wrecking house, although I think that either Mega Sceptile or Mega Swampert will be REALLY strong.

 

Mega Beedrill (i really hope it gets good boosts i want it to be useful )
Mega Sceptile
Mega Salamence
Mega Pidgeot (if it gets a spd and spa boosts it can be a good sweeper)
and Mega Metagross

 

I think Sceptile will be pretty strong. LightningRod, with great speed and special attack, along with a Dragon typing? It's going to wreck everything!

I can see Mega Metagross being incredibly powerful as well, along with Salamence. Though Salamence doesn't get Quick Attack...

 

Mega Beedrill -
Mega Sceptile
Mega Swampert
Mega Altaria - Its going to be my dragon choice
Mega Lopunny
Mega Audino - Defense and Sp.Defense will be boosted incredibly high.

 

I guess Mega Metagross will be the most powerful Mega Evolution of all. But we probably won't be able to know exactly who the best is until we get to experience it in-game ourselves

 

I think that M-Metagross is going to be pretty OP, and Mega Sceptile is going to be OP in Double Battles. Also, Mega Lopunny is being overlooked with Scrappy and fighting type.

 

Not including legends, Salamence. That thing is going to be broken.

 

Honestly, of the new Megas revealed, I have a feeling it's gonna be Salamence or Metagross. I'm leaning more toward Salamence, as it's already a nuisance as is, and having a Mega will make it even more so of one (especially since it gets a Speed boost iirc). Also agreeing with those who have stated Mega Sceptile will be a force to be reckoned with in Doubles; pair it with Rotom-W or some other good Electric type and have fun!

 

I think it's going to be Metagross. I mean, even without a mega-evo, he is still EXTREMELY strong, and giving it a mega evolution would just be too OP to handle.

 

Like some people said it is too dificult too know which mega will be more competitive. So i will go with the obvious : Metagross seems to be a destroyer with both Physical and Special Attacks but now he have a Mega and that will be..amazing xD.

 

Mega salamence and mega metagross might be a big problem to the ORAS battles, but i choose
mega swampert as my mega in doubles. Swift swim and some EVs can make to outspeed Mega sceptile, and ice punch
can handle mega salamence and mega sceptile because ice punch is a move tutor in ORAS, and they're 4 times weak to it.
Earthquake does about 90 percent with 31 IV, 252 adamant nature to mega metagross, and finish mega metagross with a priority
move such as Aqua jet and sucker punch etc. will finish mega metagross. I know sega swampert is 4 times weak to grass, meaning
almost every grass move will KO it, so it's pretty risky. Thats why i chose politoed on the next Pokémon and faint grass Pokémon
with ice beam or blizzard, and get focus blast for ferrothorn. I might put swampert protect. Then its so overpowered.

 

Mega Salamence is the most powerful.

 

No doubt about it, its mega rayquaza

 

Salamence and Metagross will wreck house, I have few doubts in my mind regarding this. On the other hand, I believe that Mega Lopunny will also be quite powerful and fast- Normal/Fighting with Scrappy is not a combo to be underestimated when you sport Return and Drain Punch. It can also learn Fake Out, which is interesting.

Though, with Jump Kick being its best fighting move, I guess I'll have to hope it gets Close Combat or Hi Jump Kick, one way or another.

 

I'd have to go with either Mega Salamence, because it was already a powerhouse to begin with, or Mega Metagross. It's already used a lot already, so having a Mega now will only increase its use lol. But I'm hoping Mega Sceptile is as awesome as I want it to be. *crosses fingers*

 

My thoughtsIt's pretty long, basically M Salamence and M Slowbro are broken in my opinion.

Spoiler

Mega Salamence

Spoiler

is straight up stupidly good, it can set up on almost anything. it sets up on Gyroball Ferrothorn, most Rotom-Ws, Landorus-T not scarf heck it can even set up on Azumarill depending on roles! I give it 2 weeks in Smogon suspect.

Spoiler

Mega Slowbro is Crocune to a ridiculous level, it does everything crocune does without getting critted. I can see that one gone too since after one CM and with a proper EV spread it basically can't be taken down. I mean just look at the damage calcs from common knock offers!252+ Atk Bisharp Knock Off (97.5 BP) vs. 252 HP / 252+ Def Slowbro: 158-188 (40.1 - 47.7%) -- guaranteed 3HKO after Leftovers recovery, that's Adamant Bisharp!
Mega Latias is also pretty darn good, just after some damage calcs I came up with the following EV Spread: 248 HP/68 Def/192 Spe with a Timid Nature. 248 HP Gives you an odd HP Number to take less from Sandstorm and Stealth Rocks. 192 Speed EV's with a Timid Nature allow you to hit 334 Speed, outspeeding Garchomp by 1 point(you might want to add 4 more to speed creep) and then you can honestly use Cosmic Power + Substitute + Roost + Stored Power. With that Speed you can set up Cosmic Power on pretty much anything not called Greninja(which you can set up on after 1 CP and without crits or flinches.) The rest is just dumped into Defense to get as much mixed Bulk as possible. This set is not too broken since it gets PP Stalled by Dark Types and ruined by steel type phazers and fast taunters, still pretty threatning though.
Mega Latios Does everything Latios does... doing less damage. I'd much rather stick to Life Orb Latios and not waste a Mega Slot, is good don't get me wrong but I would only use it if I'm weak to LO Stalling and to deal a bit more damage to Heatran, I guess it's a nice lure.
Mega Beedrill kinda sucks, you can't sweep with it cause priority wrecks it and you can not use it as an effective U-turner because it eats 25% + Spikes on entry, the U-turns sure hurt though but that doesn't make it too strong seeing how aggressive the format is.
Mega Gallade makes me so happy, I love that thing and now it takes on non scarf Keldeo! The only problem is how it suffers from 4 Slot Syndrom, you either run Dual STAB and not run Knock Off/Ice Punch or forget Zen Headbutt/Psycho Cut and get walled by Azumarill. I should try an all out attacking set without SD...
Mega Swampert haven't tested it, I haven't had too much trouble dealing with it on the ladder... It looks like a weaker Metagross that can have free rock polishes at the price of 1 Team Slot.
Mega Sceptile is pretty cool, Grass + Dragon + Focus Blast can be pretty destructive, specially with Entry Hazard Support, I don't find it that great right nw cause Mega Salamence being everywhere increased the amount of Ice Shards. I honestly love how it can't be paralized by T-Wave or Stun Spore, it's just hella fast and the only way to slow it down is via Body Slam. I can see it being a burden on the common Full Off Teams that rely on Thundurus-I for their Speed Control.
Mega Metagross puzzles me, I'm not sure whether or not it's too good, I mean it's incredibly good and Rock Polish can easily sweep careless people but it doesn't have too many free switch ins or free set up opportunities. Plus since M-Mence is running around, Mence + Trappers are everywhere and Sash Dugtrio gives this thing massive headaches, and so can do Magnezone if you decide on running Ice Punch over Earthquake(so a bit of a 4 Slot Syndrom there)
M-Sharpedo is just crappy, you only get one chance to pull off a sweep since you loose your speed boost. If it ever becomes a thing people will just run scarf keldeo for a while, and azumarill. Maybe it could work as an whole oppener in teams, it still packs a punch.
M-Sableye: I'm yet to test this thing too, so far I feel more threatened by regular Sableye... Though it is a cool Magic Bouncer that's for sure.
M-Lopunny looks awsome! Scrappy High Jump Kicks for everyone. It's movepool is kinda limited but I feel like just dual STAB + Fake Out + Toxic works in OU just fine. I probably wouldn't use it over Gallade because I don't like relying on High Jump Miss.
M-Diancie is a lot of fun, it does SO MUCH DAMAGE with it's stabs and Earth Power completes it pretty nicely, I feel like HP Fire for Ferrothorn isn't worth putting over Rock Polish though. It's kinda like a mixture between M-Metagross with it's Rock Polish and great moves and a bit like M-Beedrill in a sense where it gets hurt by priority(obviously not as badly as beedrill does). The biggest thing is of course being mixed.
M-Altaria is a Dragon with a Dragon inmunity and no longer weak to Stealth Rocks, looks awsome in paper but it's stats are sort of subpar, the DD Set is kinda cool but you obviously need two DDs to get some real work done. The Special Set is a lot of fun, maybe not top OU Quality but it has it's niche.
The rest of the megas are not good enough to be a real threat in OU in my opinion.
This is just me though.

 

While I do agree with you, remember this thread refers to non-legendaries only!

I'm not a competitive battler myself, but I do think people have the right idea with Mega Salamence and Mega Metagross. They're going to be a nasty force to be reckoned with, for sure!

 

Sorry about that, I wasn't paying attention
I would probably say mega Salamance.