How to beat Iron Boulder ex

Iron Boulder ex has 1 version in the 2026–27 Standard format, with up to 240 HP as a Fighting Pokémon. Here's the maths for Knocking it Out — worked out from every Standard-legal card.

HP: 240

Weakness: Grass

Resistance: None

Prizes: 2

One-hit KOs: 78

Fastest KO: 1 Energy

Game plan

Hit its Weakness. Iron Boulder ex is weak to Grass, so those attacks do double damage. 37 Standard cards can Knock it Out in one hit that way — the fastest needs just 1 Energy.
Win the Prize trade. It gives up 2 Prize cards when Knocked Out. 35 single-Prize Pokémon can take it out in one attack, so you trade 1 Prize for 2.
Plan for its big hit. Its strongest printed attack is Power Stomp for 200 (3 Energy). 155 Standard cards have enough HP to survive one hit — before any Weakness, + or × effects.
Watch the Retreat Cost. It costs 3 Energy to retreat. If it gets stuck in the Active Spot, that's your chance.

One-hit Knock Outs using Weakness

These Grass attacks do at least 240 after Weakness. Fastest (fewest Energy) first.

Pokémon	Type	Attack	Damage	Damage to Iron Boulder ex	HP	Prizes
Decidueye Shrouded Fable	Grass	Power Shot G	170	340	150	1
Lurantis Destined Rivals	Grass	Petal Blade Dance G	130	260	120	1
Rillaboom Twilight Masquerade	Grass	Wood Hammer GG	180	360	180	1
Shiftry Temporal Forces	Grass	Energy Loop CC	140	280	150	1
Lurantis ex Pitch Black	Grass	Leaf Guard GC	140	280	260	2
Scovillain ex Temporal Forces	Grass	Two-Headed Crushing GG	140	280	260	2
Breloom Temporal Forces	Grass	Knuckle Impact GC	120	240	120	1
Ludicolo Phantasmal Flames	Grass	Lunge Out GC	120	240	160	1
Sinistcha ex Twilight Masquerade	Grass	Matcha Splash GC	120	240	240	2
Leafeon ex Prismatic Evolutions	Grass	Moss Agate GRW	230	460	270	2
Iron Leaves ex Prismatic Evolutions	Grass	Prism Edge GGC	180	360	220	2
Mega Heracross ex Phantasmal Flames	Grass	Mountain Ramming GGG	170	340	280	3

One-hit Knock Outs without Weakness

Attacks with a printed 240+ damage.

Pokémon	Type	Attack	Damage	Damage to Iron Boulder ex	HP	Prizes
Palafin ex Prismatic Evolutions	Water	Giga Impact W	250	250	340	2
Tinkaton Mega Evolution	Metal	Windup Swing M	240-	240	160	1
Slaking ex Surging Sparks	Colorless	Great Swing CC	280	280	340	2
Mega Lucario ex Ascended Heroes	Fighting	Mega Brave FF	270	270	340	3
Vikavolt Pitch Black	Lightning	Giga Railgun LL	260	260	160	1
Cynthia's Garchomp ex Ascended Heroes	Fighting	Draconic Buster FF	260	260	330	2
Luxray ex Twilight Masquerade	Lightning	Volt Strike LL	250	250	310	2
Salamence ex 30th Celebration	Dragon	Dragon Pulse RW	240	240	330	2
Mega Dragonite ex Ascended Heroes	Dragon	Ryuno Glide WLL	330	330	370	3
Mega Emboar ex Ascended Heroes	Fire	Crimson Blast RRC	320	320	380	3

Best Prize trades

Single-Prize Pokémon that Knock Out Iron Boulder ex in one attack — you give up 1 Prize, they give up 2.

Pokémon	Type	Attack	Damage	Damage to Iron Boulder ex	HP	Prizes
Decidueye Shrouded Fable	Grass	Power Shot G	170	340	150	1
Lurantis Destined Rivals	Grass	Petal Blade Dance G	130	260	120	1
Tinkaton Mega Evolution	Metal	Windup Swing M	240-	240	160	1
Rillaboom Twilight Masquerade	Grass	Wood Hammer GG	180	360	180	1
Shiftry Temporal Forces	Grass	Energy Loop CC	140	280	150	1
Vikavolt Pitch Black	Lightning	Giga Railgun LL	260	260	160	1
Breloom Temporal Forces	Grass	Knuckle Impact GC	120	240	120	1
Ludicolo Phantasmal Flames	Grass	Lunge Out GC	120	240	160	1

Pokémon that survive its biggest attack

These can take a printed 200 from Power Stomp and stay in play (Weakness included). Single-Prize Pokémon first.

Pokémon	Type	Stage	HP	Weakness	Retreat	Prizes
Wailord Journey Together	Water	Stage 1	240	Lightning ×2	4	1
Wailord ex Pitch Black	Water	Stage 1	380	Lightning ×2	4	2
Mamoswine ex Journey Together	Fighting	Stage 2	340	Grass ×2	4	2
Palafin ex Prismatic Evolutions	Water	Stage 1	340	Lightning ×2	2	2
Steven's Metagross ex Ascended Heroes	Metal	Stage 2	340	Fire ×2	3	2
Torterra ex Temporal Forces	Grass	Stage 2	340	Fire ×2	4	2
Tyranitar ex Prismatic Evolutions	Darkness	Stage 2	340	Grass ×2	3	2
Cynthia's Garchomp ex Ascended Heroes	Fighting	Stage 2	330	Grass ×2	0	2

Every Standard Iron Boulder ex card

Card	Set	HP	Stage	Attacks (cost · damage)	Retreat	Weakness
Iron Boulder ex 99/162	Temporal Forces H	240	Basic	Repulsor Axe FC 60 Power Stomp FFC 200	3	Grass ×2

Damage is the number printed on the card. Attacks marked + or × can do more, and Abilities, Tools and Stadiums can change the maths — always read the card. Energy letters: G Grass, R Fire, W Water, L Lightning, P Psychic, F Fighting, D Darkness, M Metal, N Dragon, C Colorless (any Energy).

Questions people ask

What is Iron Boulder ex weak to?

Iron Boulder ex is weak to Grass, so those attacks do double damage (×2).

How much HP does Iron Boulder ex have?

Up to 240 HP in Standard.

How many Prize cards does Iron Boulder ex give up?

2 — it's a Pokémon ex.

What can one-hit KO Iron Boulder ex?

78 Standard cards can, going by printed damage. The fastest: Decidueye's Power Shot (1 Energy, 340 damage); Lurantis's Petal Blade Dance (1 Energy, 260 damage); Palafin ex's Giga Impact (1 Energy, 250 damage).

What is Iron Boulder ex's strongest attack?

Power Stomp, which prints 200 damage for 3 Energy.

Pully Play is an independent fan guide. It isn't run by The Pokémon Company. Format facts are checked against official announcements; always confirm card legality with the official rules before a tournament.

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