Joltik's speed and access to Agility make it a formidable late-game cleaner. Hyper offensive teams will appreciate this ability to clean up weakened teams. This set aims to boost up with Agility when the opponent switches to a Ground-type or Chinchou in an attempt to absorb a Volt Switch. With a boost under its belt, Joltik can attack with Bug Buzz, Thunderbolt, or Giga Drain. Bug Buzz will be the most-used STAB, as nothing is immune to it and it has a handy Special Defense drop chance, which can turn the tides of a tight match. Thunderbolt is the strongest STAB in Joltik's movepool and hits Fighting- and Flying-type opponents, which resist Bug Buzz, hard. Giga Drain allows Joltik to defeat all Ground-types except for Numel and gives it a little recovery so it can last longer.
The EV spread and nature aim to maximize damage output. Defense EVs are useful to defend Joltik from priority. It's possible to move those EVs to HP, but they won't make any difference in survivability because of such recoil. A Life Orb is needed for this set, as it adds power to all of Joltik's attacks. Eviolite, however, is another option to help Joltik boost up in front of threats it can't scare out, but the damage output won't be enough to secure many OHKOs, such as the ones on non-Eviolite Mienfoo, Pawniard, Houndour, and Dwebble. A Timid nature should also be dismissed even though it allows Joltik to outspeed Adamant Drilbur in the sand and Naughty Drifloon after a boost. Drifloon will easily defeat non-boosted Joltik if Unburden has been activated; if it isn't, it has to be wary of Joltik's Thunderbolt. Drilbur, on the other hand, has to take a major risk switching in due to Joltik's Life Orb-boosted Giga Drain, which can potentially OHKO it, making Timid an inferior option. Unnerve is the ability of choice, as Compoundeyes is nearly useless, and Joltik's frailty in addition to Life Orb recoil means that Swarm will give a one-time boost to Bug Buzz and then Joltik will die, making it an inferior option. Unnerve, however, will prevent the odd Oran Berry user, such as Dwebble or Recycle Bronzor, from stalling out Joltik.
Rapid Spin users are good partners. Drilbur, Staryu, and Tentacool are excellent choices, having good defensive synergy with Joltik. Entry hazard setters are also a great option because they allow Joltik to secure OHKOs on threats such as Eviolite Drilbur, bulky Houndour, Murkrow, Vullaby, and Slowpoke. Dwebble and Ferroseed are also solid partners, as they can lay both Stealth Rock and Spikes. Dwebble can act as a suicide lead on hyper offensive teams, while Ferroseed can defeat opposing Rapid Spin users. Bulky Ghost-type partners, such as Misdreavus, can also help in keeping entry hazards up. Golett can set up Stealth Rock and defeat common Joltik counters, most notably Magnemite and Numel; Joltik, in turn, can easily beat the Water- and Grass-types that can stop Golett. It can also defeat Natu so that Golett won't have to worry about its Stealth Rock being bounced back. Creating setup opportunities is needed for Joltik to succeed, as it is very frail. Memento Diglett can provide such opportunities and wear down special walls and Rock-types under sand with its own Life Orb-boosted attacks. Joltik's coverage and Speed make it a good Nasty Plot recipient through Baton Pass. Mime Jr. can use Encore on a weak attack, use Nasty Plot, and then Baton Pass the boost allowing Joltik to more easily sweep through the opposing team.
Hard-hitting offensive partners can overwhelm the opposing team so Joltik can clean up afterwards. Bulky Chinchou can form a devastating offensive core with it, as it attracts Joltik's counters and can weaken them enough for Joltik to defeat them. Houndour is also a nice option, being able to take out Bronzor and Magnemite; it can also take advantage of the Fire-type attacks Joltik lures with Flash Fire. Ponyta can defeat Magnemite and cripple physical priority users with Flame Body. Roost Archen is also a very good offensive partner, as it has a high Attack stat and can thus obliterate walls. Heavy hitters such as Nasty Plot Misdreavus, Dragon Dance Scraggy, and Life Orb Murkrow can also weaken teams enough so Joltik can switch in, boost up, and sweep through the opposing team. Joltik can also switch roles with many of these Pokemon by weakening walls so the other can finish them off.
Electro Ball is a decent option over Thunderbolt, as it can reach 150 Base Power against slow threats such as Slowpoke and Munchlax. However, it isn't useful against Joltik's common counters, as they are not OHKOed. Energy Ball is a similar case because it always OHKOes Life Orb Drilbur, something Giga Drain fails to do sometimes.