Weak toRockGhostElectricIceDark ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	37.9
Zeraora	Electric	Volt SwitchPlasma Fists	32.5
Blacephalon	FireGhost	AstonishShadow Ball	32.3
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	31.8
Xurkitree	Electric	Thunder ShockDischarge	31.4
Chien-Pao	DarkIce	SnarlBlizzard	29.2
Darkrai	Dark	SnarlShadow Ball	29.0
Chandelure	GhostFire	HexShadow Ball	28.8
Gengar	GhostPoison	LickShadow BallLegacy	28.8
Glimmora	RockPoison	Rock ThrowMeteor Beam	28.7
Rampardos	Rock	Smack DownRock Slide	28.5
Absol	Dark	SnarlBrutal SwingLegacy	28.2

Rainy boosts the Electric attacks above. Windy boosts Sigilyph.

Level 40, 15 attack IV, costed against Sigilyph's own defense and typing, one per evolution family.

Sigilyph's moveset, CP and shiny All counters Raid board

Questions people ask

What is Sigilyph weak to in Pokémon GO?

Sigilyph takes 1.6 times from Rock, Ghost, Electric, Ice and Dark.

What's the best counter to Sigilyph?

Regieleki with Lock On and Thunder Cage, worth 37.9 damage per second against Sigilyph's own defense. The full ranking is above.