Moves
Quiver Dance is essential for allowing Venomoth to boost its Special Attack, Special Defense, and Speed stats, thus turning it into a fearsome sweeper. Sleep Powder can be used to immobilize foes, which is useful for giving Venomoth an opportunity to set up. Bug Buzz is a powerful STAB attack that, after a boost, deals significant amounts of damage to most of the metagame, and with a Buginium Z, it turns into a powerful Savage Spin-Out that is capable of OHKOing Scizor, Terrakion, and Nidoking at +1, which can all otherwise tank a boosted Bug Buzz. Sludge Bomb is useful for covering Fairy-types like Primarina and Togekiss, OHKOing both after a boost and Stealth Rock damage.
Set Details
Maximum investment in Special Attack is important for giving Venomoth as much power as possible, notably allowing it to almost always OHKO bulky Scizor variants with a +1 Savage Spinout, as well as OHKOing Primarina with Sludge Bomb at +1. Maximum investment in Speed with a Timid nature is also important, as it allows Venomoth to outspeed the likes of Nidoking, Togekiss, and Mamoswine without boosts as well as the entire unboosted metagame after one Quiver Dance. Tinted Lens allows Venomoth to nullify 2x resistances and dent Pokemon like Mega Aerodactyl, Scizor, and Empoleon with its STAB Bug Buzz. Buginium Z is the preferred item, as it provides Venomoth with a powerful Savage Spin-Out that, with a boost, can break past notably bulky threats like Tentacruel, Hippowdon, and Gligar.
Usage Tips
Venomoth's best function is as a sweeper on offensive teams due to its ability to break past multiple archetypes. In order for it to begin sweeping, it is best that Pokemon that 4x resist its STAB attacks, such as Klefki and Cobalion, and specially bulky Pokemon like Blissey are removed or considerably weakened. If the opponent has a Choice Scarf user that can outpace Venomoth at +1 like Infernape or Krookodile, it is crucial for Venomoth to try to get two Quiver Dance boosts by using Sleep Powder. However, trying to wallbreak as much as possible before being revenge killed is a lesser yet plausible option. Due to its frailty, Venomoth is best brought into play via slow pivot support or after a teammate has fainted. It should be brought in against a Pokemon that it forces out like Mega Altaria or a Choice-locked Fighting-type and set up with Quiver Dance as they switch out. From there, Venomoth should use Sleep Powder to immobilize whatever foe was brought in against it and take another turn to set up afterward. However, between the possibility of the foe waking up immediately after being immobilized and Sleep Powder's shaky accuracy, it should be noted that Quiver Dance can only be set up twice about 50% of the time.
Team Options
Suicide leads like Froslass, Nihilego, and Terrakion can set up entry hazards to help Venomoth break past foes more easily, and they fit quite well onto the heavily offensive teams Venomoth is often seen on. Dual screens setters such as Azelf and Xatu make great partners for Venomoth, as the safety of Reflect and Light Screen can provide it more opportunities to use Quiver Dance. Xatu can also alleviate Venomoth's weakness to entry hazards by reflecting them back by virtue of Magic Bounce. On bulkier offensive teams, entry hazard setters like Klefki can be used due to the good bulk they retain. Entry hazard removal is nearly as important as entry hazard setters, due to Venomoth's Stealth Rock weakness. This makes Pokemon such as Mega Blastoise, Starmie, and Gligar good options for teammates. Infernape and Krookodile trouble Venomoth as Choice Scarf users, which makes answers to these Pokemon, such as Hippowdon and Mega Altaria, good partners that can ultimately pave the way for Venomoth to clean up. Spinblockers such as Mimikyu and Doublade can all aid Venomoth by making sure that entry hazards aren't removed from the opponent's side of the field, which is useful for securing KOs on Pokemon like Volcanion and Scizor. Steel-type checks like Rotom-H, Lucario, and Volcanion can ease Venomoth's matchup against the likes of Scizor and Klefki, allowing it to use its Z-Move on a target of a different type. Magneton is particularly helpful due to its ability to trap and remove the likes of Scizor and Empoleon from play.