As alexwolf mentioned,
Alomomola is a very nice mon to deal with some of the new threats in ORAS. I like the specially defensive set in particular:
Alomomola @ Leftovers
Ability: Regenerator
EVs: 104 HP / 252 Def / 152 SpD
Calm Nature
IVs: 0 Atk
- Mirror Coat/Toxic
- Wish
- Protect
- Scald/Toxic
Alomomola has the ability to both take on common threats with its massive bulk while also providing Wish support to the team, which I find invaluable in the current state of the metagame given the huge emphasis on overloading. Here are some calcs:
Greninja: 252 SpA Life Orb Protean Greninja Grass Knot (60 BP) vs. 104 HP / 156+ SpD Alomomola: 283-335 (56.9 - 67.4%) -- guaranteed 2HKO after Leftovers recovery
While Alo is 2hkod by grass knot, if ninja is running grass knot, then its movepool is lacking something else. Alo can then pivot out or ninja to an appropriate teammate, restoring its health in the process and leaving ninja with life orb damage. Any other move that ninja may carry can only 3hko at best. (which alo can easily wish off).
Lopunny: 252 Atk Lopunny High Jump Kick vs. 104 HP / 248 Def Alomomola: 202-238 (40.6 - 47.8%) -- guaranteed 3HKO after Leftovers recovery
Lopunny can only 3hko, and return does even less (else lopunny has to deal with protect shenanigans). Alo can, once again, wish off the damage or provide a wish to an appropriate team member.
Metagross: 0- SpA Tough Claws Metagross Grass Knot (60 BP) vs. 104 HP / 156+ SpD Alomomola: 142-168 (28.5 - 33.8%) -- 97% chance to 4HKO after Leftovers recovery
Alo is not threatened in the slightest, and can threaten a burn or pass off a wish.
Keldeo: 252 SpA Choice Specs Keldeo Secret Sword vs. 104 HP / 248 Def Alomomola: 190-225 (38.2 - 45.2%) -- guaranteed 3HKO after Leftovers recovery
Also a nice Specs keldeo counter.
Landorus: 252 SpA Life Orb Sheer Force Landorus Earth Power vs. 104 HP / 156+ SpD Alomomola: 298-351 (59.9 - 70.6%) -- guaranteed 2HKO after Leftovers recovery
It cannot take lando on comfortably, but one free turn allows for a wish to either a teammate or to alo itself. Mirror coat shenanigans can ensue.
Altaria: 252+ SpA Pixilate Altaria Hyper Voice vs. 104 HP / 156+ SpD Alomomola: 163-192 (32.7 - 38.6%) -- 4% chance to 3HKO after Leftovers recovery
Alo can simply wish off the damage.
Some of the others are fairly obvious (Swampert, Glalie, etc.). Basically, Alo has the capability to
deal with a ton of new threats. However, using alo as a standalone wall in this meta is a very bad idea due to its pitiful offensive presence. Sub mons such as Salamence and Latias (and anything else really) can set up on Alo all day. In fact, most things that set up in any capacity can ruin alo's day. As such, it needs to be used as nothing more than a pivot. While it can counter a good number of non-setup mons, it is vital to have a second answer to just about everything. While this may seem like alo causes too much redundancy, in reality, a lot of new threats don't even
have a solid answer to begin with. Alo is a blanket check to the metagame that can also keep the team healthy enough to continue dealing with typical offensive mons.