How to beat Mega Slowbro ex
Mega Slowbro ex has 1 version in the 2026–27 Standard format, with up to 330 HP as a Psychic Pokémon. Here's the maths for Knocking it Out — worked out from every Standard-legal card.
- HP
- 330
- Weakness
- Darkness
- Resistance
- Fighting
- Prizes
- 3
- One-hit KOs
- 12
- Fastest KO
- 2 Energy
Game plan
- Hit its Weakness. Mega Slowbro ex is weak to Darkness, so those attacks do double damage. 11 Standard cards can Knock it Out in one hit that way — the fastest needs just 2 Energy.
- Win the Prize trade. It gives up 3 Prize cards when Knocked Out. 1 single-Prize Pokémon can take it out in one attack, so you trade 1 Prize for 3.
- Avoid Fighting attacks. Mega Slowbro ex resists them, so they do less damage.
- Plan for its big hit. Its strongest printed attack is Shellnado Spin for 180 (3 Energy). 204 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 Darkness attacks do at least 330 after Weakness. Fastest (fewest Energy) first.
| Pokémon | Type | Attack | Damage | Damage to Mega Slowbro ex | HP | Prizes |
|---|---|---|---|---|---|---|
| Mega Gengar ex Ascended Heroes | Darkness | Void Gale DD | 230 | 460 | 350 | 3 |
| Hydreigon ex Surging Sparks | Darkness | Crashing Headbutt DC | 200 | 400 | 330 | 2 |
| Marnie's Grimmsnarl ex Ascended Heroes | Darkness | Shadow Bullet DD | 180 | 360 | 320 | 2 |
| Paldean Clodsire ex Journey Together | Darkness | Giga Impact DDC | 220 | 440 | 280 | 2 |
| Mabosstiff Pitch Black | Darkness | Plunging Headbutt DDD | 210 | 420 | 140 | 1 |
| Arven's Mabosstiff ex Destined Rivals | Darkness | Boss Headbutt CCC | 210 | 420 | 270 | 2 |
| Yveltal ex Perfect Order | Darkness | Dark Strike DDC | 210 | 420 | 210 | 2 |
| Mega Absol ex Mega Evolution | Darkness | Claw of Darkness DDC | 200 | 400 | 280 | 3 |
| Munkidori ex Shrouded Fable | Darkness | Dirty Headbutt DDC | 190 | 380 | 210 | 2 |
| Team Rocket's Nidoking ex Destined Rivals | Darkness | Kingly Impact DDDC | 240 | 480 | 330 | 2 |
| Hydreigon ex White Flare | Darkness | Dark Bite DDDCC | 200 | 400 | 330 | 2 |
One-hit Knock Outs without Weakness
Attacks with a printed 330+ damage (after Resistance).
| Pokémon | Type | Attack | Damage | Damage to Mega Slowbro ex | HP | Prizes |
|---|---|---|---|---|---|---|
| Mega Dragonite ex Ascended Heroes | Dragon | Ryuno Glide WLL | 330 | 330 | 370 | 3 |
Best Prize trades
Single-Prize Pokémon that Knock Out Mega Slowbro ex in one attack — you give up 1 Prize, they give up 3.
| Pokémon | Type | Attack | Damage | Damage to Mega Slowbro ex | HP | Prizes |
|---|---|---|---|---|---|---|
| Mabosstiff Pitch Black | Darkness | Plunging Headbutt DDD | 210 | 420 | 140 | 1 |
Pokémon that survive its biggest attack
These can take a printed 180 from Shellnado Spin 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 |
| Copperajah Shrouded Fable | Metal | Stage 1 | 200 | Fire ×2 | 4 | 1 |
| Rhyperior Stellar Crown | Fighting | Stage 2 | 200 | Grass ×2 | 4 | 1 |
| Steelix Mega Evolution | Metal | Stage 1 | 200 | Fire ×2 | 4 | 1 |
| Copperajah Journey Together | Metal | Stage 1 | 190 | Fire ×2 | 4 | 1 |
| Tyranitar Journey Together | Darkness | Stage 2 | 190 | Grass ×2 | 3 | 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 |
Every Standard Mega Slowbro ex card
| Card | Set | HP | Stage | Attacks (cost · damage) | Retreat | Weakness |
|---|---|---|---|---|---|---|
| Mega Slowbro ex 31/84 | Pitch Black J | 330 | Stage 1 | Shellnado Spin PPP 180 | 3 | Darkness ×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).
Related: all Slowbro cards in Standard · how to knock out a 330 HP Pokémon · Darkness vs Psychic · beating big Pokémon ex · more counter guides
Questions people ask
What is Mega Slowbro ex weak to?
Mega Slowbro ex is weak to Darkness, so those attacks do double damage (×2).
How much HP does Mega Slowbro ex have?
Up to 330 HP in Standard.
How many Prize cards does Mega Slowbro ex give up?
3 — it's a Mega Evolution Pokémon ex.
What can one-hit KO Mega Slowbro ex?
12 Standard cards can, going by printed damage. The fastest: Mega Gengar ex's Void Gale (2 Energy, 460 damage); Hydreigon ex's Crashing Headbutt (2 Energy, 400 damage); Marnie's Grimmsnarl ex's Shadow Bullet (2 Energy, 360 damage).
What is Mega Slowbro ex's strongest attack?
Shellnado Spin, which prints 180 damage for 3 Energy.
What does Mega Slowbro ex resist?
Fighting — those attacks do less damage to it.
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.