#0188 · Gen 2

Skiploom — Best counters

Weaknesses

ice×2.56 double weaknessflying×1.60poison×1.60rock×1.60fire×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Kyurem (White)	iceIce Fang	iceBlizzard	Snow	10017.2
2	Baxcalibur	iceIce Fang	iceBlizzard	Snow	8214.1
3	Glalie (Mega)	iceIce Shard	iceAvalanche	Snow	8113.9
4	Weavile	iceIce Shard	iceAvalanche	Snow	7813.4
5	Blaziken (Mega)	fireFire Spin	fireBlast BurnELITE	Clear	7613.2
6	Glaceon	iceIce Shard	iceAvalanche	Snow	7613.2
7	Charizard (Mega Y)	fireFire Spin	fireBlast BurnELITE	Clear	7412.8
8	Mamoswine	icePowder Snow	iceAvalanche	Snow	7412.7
9	Abomasnow (Mega)	icePowder Snow	iceBlizzard	Snow	7412.7
10	Rayquaza (Mega)	flyingAir Slash	flyingHurricaneELITE	Windy	7112.2
11	Jynx	iceFrost Breath	iceAvalanche	Snow	7112.2
12	Kyurem (Black)	dragonDragon Tail	iceBlizzard	Snow · partial	6912.0
13	Vanilluxe	iceFrost Breath	iceAvalancheELITE	Snow	6911.9
14	Porygon Z	normalLock On	iceBlizzard	Snow · partial	6811.8
15	Blacephalon	fireIncinerate	fireOverheat	Clear	6811.7
16	Salamence (Mega)	fireFire Fang	flyingFly	Windy · partial	6711.5
17	Cetitan	iceIce Shard	iceAvalanche	Snow	6711.5
18	Eternatus	poisonPoison Jab	dragonDynamax CannonELITE	Windy · partial	6711.5
19	Diancie (Mega)	rockRock Throw	rockRock Slide	Partly Cloudy	6711.5
20	Pidgeot (Mega)	flyingGustELITE	flyingBrave Bird	Windy	6611.4

Ice hits for ×2.56 — Skiploom's Grass/Flying typing is double-weak, so those attackers outperform their score gap.
Watch its Normal/Grass/Fairy moves — counters like Kyurem (White) and Baxcalibur take super-effective damage from them.
Snow weather boosts Ice moves ×1.2 — the best time to battle Skiploom.
Not yet in GO: Chien Pao would rank in the top 5 with Powder Snow / Blizzard but hasn't been released.

Rankings are estimated cycle DPS (attack stat × move damage ÷ cycle time, with STAB and type effectiveness). Not a full battle simulation.