Moves
Rapid Spin allows Kabuto to remove entry hazards, and unlike Defog, it will not remove the Stealth Rock that Kabuto sets up on the opponent's side of the field. Rapid Spin also breaks Sturdy on opposing Pokemon, particularly lead Onix and Dwebble, and enables Kabuto to KO them next turn with Waterfall. Stealth Rock causes the opponent's Pokemon to take chip damage throughout the match. Having Rapid Spin and Stealth Rock on the same Pokemon provides good role compression. Knock Off provides great utility by allowing Kabuto to remove Eviolites and cripple defensive Pokemon, remove Berry Juice from Sturdy leads such as Onix and Dwebble, remove Choice Scarfs from Pokemon like Doduo and Chinchou, and severely damage spinblockers such as Pumpkaboo-XL and Frillish. Rock Slide hits Flying-types super effectively, making Kabuto a good Flying-type check. Aqua Jet allows Kabuto to beat Onix, Dwebble, and Focus Sash Diglett more easily, as well as picking off weakened, faster threats to your team. Waterfall lets Kabuto hit Ground-types hard, OHKOing Mudbray and 2HKOing its RestTalk set.
Set Details
Weak Armor is the preferred ability, as it doubles Kabuto's Speed after Kabuto takes a physical hit. This puts its physical bulk to good use and allows it to KO a variety of revenge killers like Abra and Choice Scarf Chinchou. 156 EVs in Speed allow Kabuto to outspeed 19 Speed and slower Choice Scarf users after a Weak Armor boost, such as Mienfoo, Pawniard, Doduo, and Gastly. A Careful nature along with the HP, Defense, and Special Defense EVs give Kabuto more defensive power, particularly specially, to survive a hit and get a Weak Armor boost. Eviolite is the chosen item because it gives Kabuto enough bulk to take most physical hits, including a Superpower from Rufflet after Stealth Rock damage and nearly always a Knock Off followed by Iron Head from Pawniard.
Usage Tips
Kabuto can be used as a lead, but should not be used as such if the opponent has a Taunt user. If the opponent has Onix or Dwebble, however, Kabuto is a great lead because it can easily defeat these common leads with Knock Off and Waterfall. If your opponent has a spinblocker such as Pumpkaboo-XL or Frillish, you can predict the switch-in and cripple it with Knock Off, dealing massive damage and removing their item. You should make use of Kabuto's bulk and resistances by using it as a Flying-type check or switching it in on resisted physical hits. Switching in on Rapid Spin allows Kabuto to double its Speed thanks to Weak Armor while taking minimal damage. However, Kabuto has limited longevity, since it takes large amounts of damage from special attacks, and Weak Armor makes each consecutive physical hit stronger by reducing Kabuto's Defense. Because of this, Kabuto should be used as a pivot and switched in and out until its job of hazard control is complete.
Team Options
Teams that need role compression appreciate Kabuto, as it functions as a Flying-type check, an entry hazard setter, and a hazard remover. Fire-types such as Ponyta, Larvesta, and Houndour appreciate Rapid Spin support and can switch in on Grass-type moves. Flame Body users such as Larvesta and Ponyta also discourage Fighting-types such as Mienfoo from throwing around too many Fighting-type moves. Flying-types such as Vullaby and Rufflet appreciate Rapid Spin support and can switch in on Ground- and Grass-type moves, and Grass-types can also switch in on Ground- and Grass-type moves. Foongus and Cottonee are especially useful, as they resist Fighting-type moves as well. Foongus can also beat most Grass-types with Sludge Bomb. In return, Kabuto can switch in on Poison-, Fire-, and Flying-type moves aimed at Grass-types. Spinblockers and Defog deterrents such as Pumpkaboo-XL and Pawniard, respectively, can help prevent foes from removing Stealth Rock. Pumpkaboo-XL can also switch in on Ground-type moves for Kabuto, and Kabuto which in return switches in on the Flying-, Fire-, and Poison-type moves aimed at Pumpkaboo. Fast pivots such as Mienfoo, Elekid, and Choice Scarf Chinchou can help to bring Weak Armor Kabuto in against weak or resisted physical attacks, giving it a Weak Armor Speed boost. Pokemon like Carvanha appreciate the extra damage that Stealth Rock provides.