Just a nitpick, but in the AC of the SR set, it says "Vaporeon's STAB Boiling...". If you mean Boiling Water, it should be changed to Sclad.
Just a nitpick, but in the AC of the SR set, it says "Vaporeon's STAB Boiling...". If you mean Boiling Water, it should be changed to Sclad.
There is a big flaw in your description of Meteor Mash's base power.
You said that Life Orb MM has a base power of 180, while Choice Band MM has a base power of 200. Both of these are wrong.
Strictly speaking, Meteor Mash always has a base power of 100. Life Orb makes attacks 30% stronger, while Choice Band makes your attack stat 50% higher. These are multiplicative, so Life Orb MM with STAB has an "effective" base power of 195, while Choice Band STAB MM would be 225.
In the early DP metagame, specially defensive metagross was used to check latias (before the bann, yes) and to totally stop all kind of gengar, making offensive team not too weak to this two offensive monsters.
The idea was a spread of 252 hp / 40 atk / 216 spec def with a careful nature, allowing metagross to survive all speced draco meteor, life orbed shadow ball and even scarfed fire blast from timid heatran...
Then, he was able to use pursuit to always kill gengar on the switch (if he really wants to stay in, pick him off with bullet punch after using pursuit), and to put offensive latias in the ko range of another stealth rock switch in.
The 2 last slot were open to what you need: meteor mash or zen headbut for powerful stabs, earthquake for coverage, thunder punch for one of the greatest gyarados counter or ice punch to kill things like salamence (it's better to wait outrage, but you survive fire blast anyway).
And i think this metagross need a come back. If you're interested i can give you more information about him =)
I've been extensively using Metagross and he is horribly underrated this Gen he is amazing. This is the set order in viability.
set orderings and suggestions over current:
1) Choice Band
[SET]
Name: Choice Band
Move 1: Meteor Mash
Move 2: Bullet Punch
Move 3: Hammer Arm
Move 4: Pursuit / Zen Headbutt / Trick
Nature: Adamant
Item: Choice Band
EVs: 252 HP / 176 Atk / 80 SpD
Choice Band Meta is awesome right now. Hammer Arm needs to be the primary coverage move, as it does MASSIVE damage to Nattorei, and new evolution stone threats like Chansey and P-2, that can actually take a Meteor Mash. It also prevents Skarm from walling you, as the speed drop will make Skarmory unable to Roost without getting railed by a super effective Hammer Arm. Pursuit and the Special Defense makes you an excellent counter to the Lati@ twins, as you can switch into even a Surf (you can take 2 with the EV spread) and OHKO with a Meteor Mash or a Pursuit switching out. Otherwise, Zen Headbutt and Trick are excellent if you have Lati@ coverage. I would also mention how this thing can outmuscle Rank, and Meteor Mash 2HKOs Gliscor.
2) "Basic Gross"
[SET]
Name: Standard
Move 1: Meteor Mash
Move 2: Bullet Punch
Move 3: Hammer Arm
Move 4: Pursuit / Stealth Rock
Nature: Adamant
Item: Leftovers / Balloon / Expert Belt
EVs: 252 HP / 176 Atk / 80 SpD
Same EV spread and purpose, but freedom to switch attacks. Stealth Rock or Pursuit depending on team needs, since this does well against Lati@.
3) Agility
4) Trick
5) Coverage Meta
[SET]
Name: Mixed
Move 1: Meteor Mash
Move 2: Hidden Power Fire
Move 3: Hammer Arm / Grass Knot / Ice Punch
Move 4: Bullet Punch
Nature: Brave
Item: Expert Belt
EVs: 220 HP / 136 Atk / 60 SpA / 92 Spe
Same kinda deal, cept Hidden Power Fire for Nat, Forretress, and Skarmory. EV Spread outspeeds physically defensive Skarm and 2HKOs with Hidden Power Fire, which also 2HKOs Nat and OHKOs some Forry and Scizor. Hammer Arm for coverage (better than Earthquake these days), and Bullet Punch, is just Bullet Punch. Ice Punch for Gliscor, Grass Knot for Hippo.
-Replace Earthquake on the Choice Band set with Hammer Arm. In fact, replace all mentions of Earthquake with Hammer Arm.