#0639 · Gen 5 · Legendary

Terrakion — Best counters

Weaknesses

fighting×1.60ground×1.60steel×1.60water×1.60grass×1.60psychic×1.60fairy×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Lucario (Mega)	fightingForce PalmELITE	fightingAura Sphere	Overcast	10013.9
2	Alakazam (Mega)	psychicConfusion	psychicPsychicELITE	Windy	9613.4
3	Kyogre (Primal)	waterWaterfall	waterOrigin PulseELITE	Rainy	9312.9
4	Groudon (Primal)	groundMud Shot	groundPrecipice BladesELITE	Clear	9212.7
5	Sceptile (Mega)	grassBullet Seed	grassFrenzy PlantELITE	Clear	8712.1
6	Blaziken (Mega)	fightingCounter	fightingFocus Blast	Overcast	8712.1
7	Latios (Mega)	psychicZen Headbutt	fightingAura Sphere	Overcast · partial	8612.0
8	Zacian (Crowned)	steelMetal Claw	fairyPlay Rough	Overcast · partial	8612.0
9	Gardevoir (Mega)	psychicConfusion	psychicPsychic	Windy	8611.9
10	Gallade (Mega)	psychicConfusion	psychicPsychic	Windy	8611.9
11	Mewtwo	psychicConfusion	psychicPsystrikeELITE	Windy	8311.6
12	Heracross (Mega)	fightingCounter	fightingClose Combat	Overcast	8311.5
13	Metagross (Mega)	steelBullet Punch	steelMeteor MashELITE	Snow	8311.5
14	Hoopa (Unbound)	psychicConfusion	psychicPsychic	Windy	8211.3
15	Garchomp (Mega)	groundMud Shot	groundEarthquake	Clear	8111.3
16	Kartana	grassRazor Leaf	grassLeaf Blade	Clear	8011.2
17	Landorus (Therian)	groundMud Shot	groundSandsear StormELITE	Clear	7911.0
18	Swampert (Mega)	waterWater Gun	waterHydro CannonELITE	Rainy	7810.9
19	Deoxys (Attack)	psychicZen Headbutt	psychicPsycho Boost	Windy	7810.8
20	Pheromosa	fightingLow Kick	fightingFocus Blast	Overcast	7810.8

Terrakion is weak to Fighting (×1.6), Ground (×1.6), Steel (×1.6), Water (×1.6), Grass (×1.6), Psychic (×1.6), Fairy (×1.6).
Watch its Rock/Psychic/Fighting/Ground moves — counters like Lucario (Mega) and Groudon (Primal) take super-effective damage from them.
Overcast weather boosts Fighting moves ×1.2 — the best time to battle Terrakion.

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