Volbeat

Illuminate
Increases wild encounter rate.
Swarm
Boosts power of Bug moves 50% when at 1/3 HP or less.
Type Tier
Bug NU
Statistics
Min- Min Max Max+
HP
65
- 271 334 -
Atk
73
163 182 245 269
Def
55
131 146 209 229
SpA
47
117 130 193 212
SpD
75
167 186 249 273
Spe
85
185 206 269 295
Name Item Nature

Tail Glow

Leftovers / Salac Berry Timid
Moveset EVs
~ Tail Glow
~ Baton Pass
~ Ice Punch / Substitute
~ Thunderbolt
96 HP / 252 SpA / 160 Spe

Other than Smeargle, Volbeat is the only Pokémon that can learn Tail Glow; even its female counterpart Illumise cannot learn it. Tail Glow, and attack anything that wants to phaze or Haze you, Baton Pass out when you cannot kill. You can Substitute down to activate a Salac Berry, which is pretty much a guaranteed sweep if you pass to something with high Speed and Special Attack.

Name Item Ability Nature

Parafusion

Leftovers Swarm Adamant
Moveset EVs
~ Thunder Wave
~ Confuse Ray
~ Signal Beam
~ Hidden Power Rock
252 HP / 96 Atk / 160 Def

Parafusion set. Bug and Rock will hit most Pokémon at least neutral, except for Steels and pure Fighters. Speed isn't needed because Thunder Wave makes Volbeat faster than whatever is out, unless it's something like Gligar or Hitmonlee, but you cannot harm them with this moveset, anyway.

Name Item Ability Nature

Choice Bander

Choice Band Swarm Jolly
Moveset EVs
~ Signal Beam
~ Hidden Power Rock
~ Focus Punch / Return
~ Quick Attack / Trick
96 HP / 252 Atk / 160 Spe

A fun Choice Band set. It can work to an extent, especially if you want some pizazz in your team. If you can Trick something that doesn't want a Choice Band, Volbeat has done it's job. Focus Punch is great for predicting switches, especially to stuff like Aggron, but Return can be used to hit Gligar a bit harder.

Name Item Nature

Trickbander

Choice Band Timid
Moveset EVs
~ Tail Glow
~ Trick
~ Thunder / Thunderbolt
~ Baton Pass / Ice Punch
252 HP / 96 SpA / 160 Spe

A mix of the Tail Glow set and the Choice Bander. Trick an unsuspecting opponent, and then try to get in a Tail Glow. Hit stuff, or Baton Pass away.

Other Options

You can always steal the opponent’s item right when you’re about to get KOed with Thief. Moonlight for some healing reasons if you think you can survive a hit.

EVs

Volbeat will generally want 270 Speed if he has Ice Punch, as this beats Adamant Gligar. This requires 160 EVs and a +Speed nature. If Volbeat doesn't have moves to hit Gligar hard, this is much less important, as most Pokémon Volbeat needs to outspeed don't invest in Speed EVs and have a lower base Speed (such as Solrock), so a minimal investment is all that is needed.

Opinion

Speed is really Volbeat's only decent stat, and its only advantage over other Pokémon is that it can Baton Pass Tail Glow. It has a typing that gives it few useful resistances outside of Earthquake, as well. However, it does have some interesting options in Baton Pass, Trick, and a decent offensive movepool, so it's not entirely bad.

Counters

OU counters: Skarmory, Steelix, Weezing, and Suicune can all stop physical versions. Skarmory and Suicune can stop any that don't use Tail Glow + Thunderbolt, really. Salamence, although killed by Ice Punch after a Tail Glow, is faster than Volbeat and OHKOs with Hidden Power Flying. Heracross has the Special Defense to take any hits and can just use Megahorn for the easy OHKO. Any phazer that isn't weak to Electric (and sometimes Ice) can prevent it from Baton Passing, and any fast, heavy-hitter can OHKO Volbeat before it can use Baton Pass.

UU counters: Gligar can defeat those without Ice Punch, although a Choice Band set has a chance to 2HKO with Return if Gligar doesn't have any HP EVs. Aggron is safe as long as it stays out of Focus Punch. Fearow makes a good counter with its superior Speed and STAB on Drill Peck, but it doesn't like switching into Hidden Power Rock or Thunderbolt (although Thunderbolt won't do that much without a Tail Glow). Hitmonlee will usually outspeed Volbeat, and can OHKO with Rock Slide; Hitmonlee resists Hidden Power Rock and Signal Beam, and has the Special Defense needed to take Thunderbolt and Ice Punch. Kangaskhan just absorbs any of Volbeat's weak hits, except Choice Band Focus Punch, and retaliates with STAB Return. Basically any heavy hitter that is either faster than Volbeat or isn't weak to one of his moves (and even if it is weak, Volbeat won't do that much) can counter him.