Alright, so I nominated this set a couple of weeks ago in the OU thread and it ended up in a four-way tie that I unfortunately lost. Without further ado, I present to you:
Specs Regenerator Reuniclus
Reuniclus @ Choice Specs
Ability: Regenerator
EVs: 252 HP / 4 Def / 252 SpA
Modest Nature
- Future Sight
- Focus Blast
- Shadow Ball
- Psyshock
This set is very peculiar as it has Regenerator instead of Magic Guard for its ability. Regenerator is this Reuniclus' only way of staying healthy and is very useful as this set is constantly going to switch out due to its hit-and-run nature (Choice Specs oblige). Reuniclus also doesn't mind the damage from entry hazards that much as it will get its health back once it switches out.
Future Sight is another feature that's rarely seen on Reuniclus that adds on to the surprise factor of this set (most will predict a Calm Mind setup or even a Trick Room sweeper set) and this 120BP move comes out really strong from a Specs-equiped fully invested base 125 SpA (don't forget STAB!). Once Future Sight is used, Reuniclus only has to switch out to a teammate (mostly Fighting-type mons to scare off Dark-type ones) which can pressure the opposing mon into switching back to another mon which won't necessarily like to take a powerful Psychic-type move, forcing the opposing team to sacrifice (most of the time) one of its mons. Also, note that Future Sight bypasses any protection move such as Protect,
Detect, Endure and even Substitute.
On to the other moves! Focus Blast is used to scare Dark-types from switching into Reuniclus and KO them on the switch-in if they dare to. Shadow Ball has neat coverage alongside Focus Blast and hits opposing Psychic-types pretty hard. Psyshock is a less powerful STAB move and can be useful for instant damage, especially during late-game, and hitting on the physical side, which helps it against Calm Mind, Assault Vest users and special walls in general. The suggested spread, nature and item are pretty straightforward: max HP / max SpA, Modest and Specs for nice bulk (though it wishes it could have a bit more), getting the most out of Regenerator and maximum firepower.
Obviously, Reuniclus has issues with Pursuit trappers (we all know how unreliable and frustrating Focus Blast can be). Double switches are very useful when your opponent still has a Pursuit trapper as it'll make you avoid being Krookodile/Snorlax/other Pursuit trapper food and gain momentum (not to mention Reuniclus will get 1/3 of its max HP back).