Moves
Volt Switch allows Vikavolt to pivot in and out of battle as well as bring in a teammate safely thanks to its low Speed. Bug Buzz allows Vikavolt to threaten out Grass-types like Shaymin, Virizion, and Tsareena, which resist Volt Switch. Roost heals Vikavolt from prior damage and grants it more time to pivot. Energy Ball hits Ground-type switch-ins such as Rhyperior, Seismitoad, and Gastrodon for super effective damage.
Set Details
60 EVs in Speed allow Vikavolt to outpace Registeel and uninvested Donphan. The rest of the EVs should be used to capitalize on Vikavolt's bulk. Rocky Helmet is the preferred item to punish physically offensive Pokemon like Machamp, Virizion, and Metagross for using contact moves, which Vikavolt can take easily.
Usage Tips
Vikavolt should use its resistances to Fighting, Grass, and Steel to safely come in against Pokemon like Machamp, Shaymin, and Metagross, which are usually threatened out thanks to its raw power putting a sizable dent into anything that doesn't resist its moves. It can also come in against Pokemon that are generally no threat to it such as Roserade, Passimian, and Virizion lacking Stone Edge. Because Vikavolt usually forces switches, it can be a good idea to use Roost to keep itself healthy. Volt Switch should be the move used the most so Vikavolt can pivot in and out of battle. Should a Ground-type switch-in like Rhyperior be anticipated, it is generally safe to use Energy Ball to heavily dent or OHKO it. While it is generally an offensive support Pokemon, Vikavolt can attempt to wallbreak early- to mid-game through punching holes in defensive Pokemon like Rhyperior, Metagross, and Slowbro for its teammates. Do not let Vikavolt get worn down too much; try to remove Stealth Rock so Vikavolt can pivot much more throughout the match, and avoid Toxic if you can, since being poisoned also chips away Vikavolt's decent bulk.
Team Options
Vikavolt can be used alongside other Volt Switch or U-turn users such as Raikou, Ribombee, and Mandibuzz. Teammates that can get rid of entry hazards such as Mega Blastoise, Florges, and Donphan are much appreciated by Vikavolt so it can pivot more often. Fire-resistant Pokemon such as Arcanine, Rhyperior, and Diancie also make good partners for Vikavolt. In return, Vikavolt can threaten out the Water- and Grass-types that plague them. Pokemon that can threaten Rock-types such as Zygarde-10%, Metagross, and Virizion are also good teammates for Vikavolt. Offensive Pokemon like Gardevoir, Shaymin, Swellow, and Goodra appreciate Vikavolt's ability to weaken Steel-types like Metagross so they can spam their powerful STAB moves more often. They also appreciate the slow Volt Switch Vikavolt provides so they can come into battle safely. Wallbreakers like Machamp, Tyrantrum, and Bewear also appreciate Vikavolt's slow Volt Switch. A cleric or Healing Wish user like Florges, Diancie, or Gardevoir can help heal Vikavolt in case it has been badly poisoned or worn down heavily by Stealth Rock and weak attacks. Diancie can also set Stealth Rock and appreciates Vikavolt's ability to switch into Steel-, Water-, and Ground-types.