#0635 · Gen 5

Hydreigon — Best counters

Weaknesses

fairy×2.56 double weaknessfighting×1.60bug×1.60ice×1.60dragon×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Gardevoir (Mega)	fairyCharm	fairyDazzling Gleam	Overcast	10018.2
2	Enamorus (Incarnate)	fairyFairy Wind	fairyDazzling Gleam	Overcast	8615.7
3	Alakazam (Mega)	fightingCounterELITE	fairyDazzling GleamELITE	Overcast	8114.7
4	Eternatus	dragonDragon Tail	dragonDynamax CannonELITE	Windy	8014.6
5	Zacian (Crowned)	steelMetal Claw	fairyPlay Rough	Overcast · partial	7914.5
6	Enamorus (Therian)	fairyFairy Wind	fairyDazzling Gleam	Overcast	7613.9
7	Xerneas	fairyGeomancyELITE	fairyMoonblast	Overcast	7613.9
8	Lucario (Mega)	fightingForce PalmELITE	fightingAura Sphere	Overcast	7613.9
9	Rayquaza (Mega)	dragonDragon Tail	dragonBreaking SwipeELITE	Windy	7613.9
10	Gallade (Mega)	fairyCharm	fightingClose Combat	Overcast	7313.3
11	Gardevoir	fairyCharm	fairyDazzling Gleam	Overcast	7313.2
12	Hatterene	fairyCharm	fairyDazzling Gleam	Overcast	7313.2
13	Eternatus (Eternamax)	dragonDragon Tail	dragonDynamax CannonELITE	Windy	7213.2
14	Tapu Koko	normalQuick Attack	fairyNatures MadnessELITE	Overcast · partial	7213.2
15	Tapu Lele	ghostAstonish	fairyNatures MadnessELITE	Overcast · partial	7012.7
16	Latias (Mega)	fairyCharm	fightingAura Sphere	Overcast	7012.7
17	Togekiss	fairyCharm	fairyDazzling Gleam	Overcast	6912.6
18	Garchomp (Mega)	dragonDragon Tail	dragonBreaking Swipe	Windy	6912.5
19	Primarina	fairyCharm	fairyMoonblast	Overcast	6812.4
20	Tapu Bulu	grassBullet Seed	fairyNatures MadnessELITE	Overcast · partial	6812.3

Fairy hits for ×2.56 — Hydreigon's Dark/Dragon typing is double-weak, so those attackers outperform their score gap.
Watch its Dark/Dragon/Steel moves — counters like Gardevoir (Mega) and Enamorus (Incarnate) take super-effective damage from them.
Overcast weather boosts Fairy moves ×1.2 — the best time to battle Hydreigon.

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