Swarm (ability)

Effect

Swarm increases the power of Bug-type moves by 50% (1.5×) when the ability-bearer's HP falls below a third of its maximum (known in-game as in a pinch).

Outside of battle

If a Pokémon with Swarm is the leading party Pokémon, wild Pokémon are twice as likely to appear.

Game descriptions

Ruby​/​Sapphire
FireRed​/​LeafGreen
Emerald		 Ups BUG moves in a pinch.
Diamond​/​Pearl
Platinum
HeartGold​/​SoulSilver		 Powers up Bug-type moves in a pinch.
Black​/​White
Black 2​/​White 2		 Powers up Bug-type moves in a pinch.
X​/​Y
O.Ruby​/​A.Sapphire		 Powers up Bug-type moves when the Pokémon is in trouble.
Sun​/​Moon
Ultra Sun​/​Ultra Moon		 Powers up Bug-type moves when the Pokémon’s HP is low.

Other languages

English Swarm
Japanese むしのしらせ (Mushi no Shirase)
German Hexaplaga
French Essaim
Italian Aiutinsetto
Spanish Enjambre

Pokémon with Swarm

#
Name
2nd ability
Hidden ability
015 Beedrill — Sniper
123 Scyther Technician Steadfast
165 Ledyba Early Bird Rattled
166 Ledian Early Bird Iron Fist
167 Spinarak Insomnia Sniper
168 Ariados Insomnia Sniper
212 Scizor Technician Light Metal
214 Heracross Guts Moxie
267 Beautifly — Rivalry
313 Volbeat Illuminate Prankster
402 Kricketune — Technician
414 Mothim — Tinted Lens
540 Sewaddle Chlorophyll Overcoat
542 Leavanny Chlorophyll Overcoat
543 Venipede Poison Point Speed Boost
544 Whirlipede Poison Point Speed Boost
545 Scolipede Poison Point Speed Boost
588 Karrablast Shed Skin No Guard
589 Escavalier Shell Armor Overcoat
632 Durant Hustle Truant
736 Grubbin — —

Swarm as a hidden ability

#
Name
Other abilities
595 Joltik Compound Eyes
Unnerve
596 Galvantula Compound Eyes
Unnerve
636 Larvesta Flame Body
637 Volcarona Flame Body