mega mence is objectively broken, gonna get that out there for people who didn't already know
but anyways mega sceptile seems interesting, i've even made a mixed attacker set already
Sceptile @ Sceptilite
Ability: Overgrow
EVs: 4 Atk / 252 SpA / 252 Spe
Hasty/Rash Nature
- Leaf Storm
- Earthquake
- Dragon Pulse
- Hidden Power [Fire]
so this set has great coverage+power(if rash) and it has a nice n powerful 145 speed. rash leaf storm just hits like a fucking truck with bombs inside, and dragon pulse is spammable because no fairy i know of likes eating a leaf storm. earthquake nabs heatran which otherwise walls your coverage, and HP fire rounds it out by hitting skarmory, ferrothorn, and mega scizor. also made an sd set:
Sceptile @ Sceptilite
Ability: Overgrow
EVs: 252 Atk / 4 Def / 252 Spe
Jolly/Adamant Nature
- Swords Dance
- Earthquake/Thunderpunch/Drain Punch
- Dragon Claw/Outrage
- Leaf Blade
may not be as viable as the mixed wall breaker but mega sceptiles access to swords dance and superior physical move pool lend itself well to sd. it takes great advantage of its speed and paralysis immunity to beat things that would normally beat most SD users. of course, its clearly weaker than most due to lack of item, but it beats things that normally beat most SD users. as such, it makes a great partner for things like SD terrakion.
lets discuss the most broken one and what i believe to be its best set
Salamence @ Salamencite
Ability: Intimidate
EVs: 64 Atk / 192 SpA / 252 Spe
Naive/Rash Nature
- Draco Meteor
- Return
- Earthquake
- Fire Blast
insane coverage, bulk, and power, not unlike our old friend dpp salamence. the spread is obviously a wip, having stole it from the analysis from BW. but basically, draco meteor shreds most physical walls such as quagsire, rhyperior, lando-t, and some other things. return rounds out things like clefable, chansey, and other special walls considering that few of them resist flying. the rest is just for stuff that your stabs don't hit like skarmory, heatran, ferrothorn, mega scizor, and most steel types pretty much. i believe that mixed>dd because thats what is was like in dpp and since this is like dpp salamence 2.0 i don't see why mixed wouldn't be its best yet again.
as for mega metagross, there isn't a clear best set atm, but this should be a nice one
Metagross @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Meteor Mash
- Earthquake
- Pursuit
- Bullet Punch/Zen Headbutt/Thunderpunch/Stealth Rock
basically it can be a wall breaker, SR setter, a great pursuit trapper, and a switch in to latis, azumarill, and cc pinsir, basically being so much for a teamslot. it is among the best pursuit trappers, having a high speed and tough claws, while also being really strong outside of pursuit. the last slot is basically for the 4mss, basically choosing between SR, zen, and tpunch. max evs so it can be as good a pursuit trapper as possible.
here is my best set for sableye:
Sableye @ Sablite
Ability: Prankster
EVs: 248 HP / 252 Def / 8 SpA
Bold Nature
- Substitute/Will-O-Wisp/Taunt/Dazzling Gleam
- Calm Mind
- Recover
- Dark Pulse/Shadow Ball
mono attacking sableye has prankster first turn and magic guard afterwards. after it fires off a prankster CM/sub/wisp/taunt due to turn order stuff, it becomes a decently strong attacker while also becoming a good special tank on top of its physical bulk. dark pulse is the preferred option if mono, shadow ball if dazzling gleam. it sets up on mega medicham, which is lol.
mega gallade seems like it should be a faster and weaker mega medicham that has access to SD and close combat.
Gallade (M) @ Galladite
Ability: Steadfast
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Close Combat
- Knock Off/Psycho Cut/Shadow Sneak/Ice Punch
- Thunder Punch/Psycho Cut/Shadow Sneak/Ice Punch
there are other options i don't feel like listing such as taunt, stone edge, sub, leaf blade and some other stuff. basically a setup sweeper with some good coverage. also has that positively FABULOUS cape. it seems like it should be able to hit hard as soon as it comes in and then should be able to set up n sweep when the time is right. has access to priority that has sick coverage w/ cc and also access to bolt beam via elemental punches. its just crazy man
gonna make a set for beedrill because i can
Beedrill @ Beedrillite
Ability: Swarm
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Drill Run
- X-Scissor
- Poison Jab
- Swords Dance
basically SD. it would be most effective if it gets like 50/50 boosts in attack/speed, but it still has decent coverage+power with adaptability. it gets walled by the usual suspects, but it should suffice if you wanted to use mega beedrill in OU. it seems kinda mediocre, but hey if you wanted a challenge its here.
now for mega pidgeot
Pidgeot @ Pidgeotite
Ability: Big Pecks
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Hurricane
- Heat Wave
- Substitute
- Roost
subroost no guard hurricanes+heat waves are hella hard to switch into even if it gets like +40 satk because of the coverage. it doesnt have much else, so thats why it is sub roost. hurricane is hard to switch into even if you resist it because of the retarded confusion chance. heat wave also has a slight burn chance. sub allows it to fire off hurricanes freely against offense.
not gonna talk about the rest because too much effort
EDIT:252+ Atk Refrigerate Glalie Explosion vs. 252 HP / 252+ Def Skarmory: 313-369 (93.7 - 110.4%) -- guaranteed OHKO after Stealth Rock