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Mega Steelix EX & Indeedee EX Deck Guide

Energy Types
MetalMetal
Simbozz Published June 3, 2026 Updated June 3, 2026

Mega Steelix EX & Indeedee EX is one of the toughest decks to beat in Pokémon TCG Pocket right now. Mega Steelix EX is a massive Metal wall with 220 HP and Adamantine Rolling, which takes -20 damage on the opponent's next turn — and on top of that Mega Steelix takes no Weakness damage at all. Pair that with Indeedee EX's Watch Over ability, which heals 20 damage from the Active Pokémon every turn, plus Pokémon Center Lady, Potion, Steel Apron and Starting Plains, and you have arguably the single strongest defensive deck in the entire game.

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Strengths

  • Mega Steelix EX is one of the bulkiest attackers in the format and has no Weakness
  • Indeedee EX's Watch Over heals 20 damage from the Active Pokémon every turn
  • Adamantine Rolling reduces incoming damage by 20 on the next turn
  • Stacked healing from Pokémon Center Lady, Potion, Steel Apron and Starting Plains

Weaknesses

  • Stage 2 line means Mega Steelix is slow to set up
  • Both Mega Steelix EX and Indeedee EX are 2-prize liabilities
  • Damage output is low — games can go very long
  • Vulnerable to disruption that prevents healing or removes Tools

Key Matchups

  • EX-heavy attackers Favored
  • Stage 2 midrange Favored
  • Single-prize aggro Even
  • Tool removal / control Unfavored

Strategy Overview

Open Onix, attach Metal energy and immediately start digging for Brock to ramp energy, then Rare Candy into Mega Steelix EX. Bench Indeedee EX early so Watch Over starts healing the Active each turn. Use Adamantine Rolling to wall behind a -20 damage buffer, and stack healing through Pokémon Center Lady, Potion, Steel Apron and Starting Plains. Cyrus pulls a damaged opposing Pokémon active for a clean knockout.

Gameplay Video

Key Cards

Mega Steelix EX

Main attacker — 220 HP wall with Adamantine Rolling and no Weakness.

Indeedee EX

Heals 20 damage from your Active Pokémon every turn with Watch Over.

Onix

Basic line for Mega Steelix; Dig prevents damage on a heads coin flip.

Brock

Metal energy acceleration from the Energy Zone onto Golem or Onix.

Steel Apron / Starting Plains

Stack -10 damage reduction and +20 HP for extra bulk.

Early Game

Bench Onix and Indeedee EX, attach Metal energy and use Brock and Professor's Research to find Rare Candy. On turn one with Mega Steelix EX & Indeedee EX, your priority is finding Mega Steelix EX or Indeedee EX so you can start attaching Metal energy on schedule. If you open with the wrong basic, search aggressively with Professor's Research or Poké Ball before committing energy you might waste. Bench every basic you intend to evolve as early as possible — Mega Steelix EX and Indeedee EX need time to come online, and an empty bench turn one usually loses you the tempo war. Preserve removal Supporters like Cyrus or Sabrina for the mid game; using them on turn one is rarely worth the lost draw. Against fast aggressive openings hinted at by your unfavored matchups (stage 2 line means mega steelix is slow to set up), bench a pivot so a surprise knockout on the active does not strand your evolution line.

Mid Game

Rare Candy into Mega Steelix EX, start chaining Adamantine Rolling and let Watch Over heal each turn. By the mid game Mega Steelix EX & Indeedee EX should have Mega Steelix EX powered and at least one back-up attacker on the bench. This is the window where the deck's core engine — Mega Steelix EX, Indeedee EX, Onix — has to actively trade prizes. Sequence your attacks so each knockout sets up the next: leave a damaged opposing Pokémon active for Cyrus, or use Sabrina to drag out a benched threat before it can power up. Track your prize trade carefully. Mega Steelix EX & Indeedee EX leans on the strengths "Mega Steelix EX is one of the bulkiest attackers in the format and has no Weakness" and "Indeedee EX's Watch Over heals 20 damage from the Active Pokémon every turn", so push the board state that maximises those lines rather than auto-attacking the active. If you fall behind on board, pivot to a single-prize attacker and use this turn to rebuild instead of giving up a multi-prize knockout.

Late Game

Outlast the opponent with stacked healing, then use Cyrus to drag a damaged benched Pokémon up for the closing knockout. Late game with Mega Steelix EX & Indeedee EX is about closing on your terms. Count your remaining prizes and the opponent's, then build the exact attack sequence that wins before they can stabilise. If you are ahead, deny the comeback: knock out their last realistic attacker or use Sabrina to strand a benched Pokémon that cannot retreat. If you are behind, look for an OHKO line using Mega Steelix EX — Mega Steelix EX & Indeedee EX typically wins from behind by chaining a single huge turn rather than grinding back evenly. Be ready to spend every remaining Supporter and energy on the closing turn; holding resources "just in case" after the prize race is decided is the most common way to throw a winning position with this deck.

Mulligan Guide & Opening Priorities

The ideal opener for Mega Steelix EX & Indeedee EX is Mega Steelix EX + Indeedee EX in hand with a way to attach Metal energy on the first turn. Mulligan decisions in Pokémon TCG Pocket are limited, so focus on what you keep: prioritise basics that evolve into your key attackers, plus at least one draw Supporter like Professor's Research or Iono. Hold onto Rare Candy or stage-up pieces even if they look dead early — they enable the explosive mid game this deck depends on. Preserve removal cards (Cyrus, Sabrina) for when the opponent has a damaged or vulnerable bench rather than spending them on the first available target.

Common Mistakes

  • Benching Mega Steelix EX too early without protection, letting the opponent snipe your main attacker before it is powered.
  • Attaching Metal energy to a Pokémon that will not attack this game instead of building toward your win condition.
  • Spending Cyrus or Sabrina on turn one for tempo when they would have closed a prize two turns later.
  • Evolving on curve into Mega Steelix EX without first checking whether you have the energy to attack the same turn.
  • Ignoring the weakness "Stage 2 line means Mega Steelix is slow to set up" and not boarding a pivot or single-prize back-up in unfavored matchups.
  • Auto-attacking the active Pokémon instead of using Sabrina/Cyrus to set up the knockout sequence the deck actually wants.
  • Burning Professor's Research with a full hand and losing the cards you still needed for the closing turn.

Card Replacements

Mega Steelix EXNo direct replacement

Mega Steelix EX fills a unique role in Mega Steelix EX & Indeedee EX (main attacker — 220 hp wall with adamantine rolling and no weakness.). If you do not own it, the deck cannot be rebuilt around a single swap — consider playing a different Metal archetype until you can craft it.

Indeedee EXNo direct replacement

Indeedee EX fills a unique role in Mega Steelix EX & Indeedee EX (heals 20 damage from your active pokémon every turn with watch over.). If you do not own it, the deck cannot be rebuilt around a single swap — consider playing a different Metal archetype until you can craft it.

OnixNo direct replacement

Onix fills a unique role in Mega Steelix EX & Indeedee EX (basic line for mega steelix; dig prevents damage on a heads coin flip.). If you do not own it, the deck cannot be rebuilt around a single swap — consider playing a different Metal archetype until you can craft it.

Professor's ResearchIono

Iono is a strong universal draw Supporter and slots into nearly any deck if you are missing copies of Professor's Research, though it costs you raw card quantity.

CyrusSabrina

Cyrus pulls a damaged bench Pokémon active; Sabrina lets the opponent choose, but still forces a switch and keeps your closing pressure alive.

Frequently Asked Questions

Is Mega Steelix EX & Indeedee EX beginner friendly?

Mega Steelix EX & Indeedee EX is a tournament deck build in Tier S. It has a few decision-heavy turns and a real evolution line to manage, so newer players should expect a learning curve before they pilot it well. Read the Early/Mid/Late Game sections above before queuing into ranked.

Is Mega Steelix EX & Indeedee EX good for ranked ladder?

Yes — Mega Steelix EX & Indeedee EX sits in Tier S of the current meta, and its strengths (Mega Steelix EX is one of the bulkiest attackers in the format and has no Weakness, Indeedee EX's Watch Over heals 20 damage from the Active Pokémon every turn) line up well against most ladder decks. As an S-tier deck it is one of the safest picks for climbing right now.

What are the hardest matchups for Mega Steelix EX & Indeedee EX?

The toughest matchups are Tool removal / control. These decks attack the parts of your plan flagged in the Weaknesses section — usually stage 2 line means mega steelix is slow to set up. Mulligan harder for your fastest opener and lean on single-prize attackers to slow down the prize trade.

What should I craft first for Mega Steelix EX & Indeedee EX?

Prioritise Mega Steelix EX and Indeedee EX — these are the cards the deck cannot function without. Draw Supporters (Professor's Research, Iono) and removal (Cyrus, Sabrina) are universal staples and worth crafting even if you later swap archetypes.

Can I play Mega Steelix EX & Indeedee EX without the main Metal engine?

Not really. Mega Steelix EX & Indeedee EX is built around Mega Steelix EX and the Metal energy line — removing that core turns it into a different deck. If you are missing pieces, check the Card Replacements section above for the closest realistic alternatives, or play a budget archetype until you can craft the missing cards.

Is Mega Steelix EX & Indeedee EX tournament viable?

Mega Steelix EX & Indeedee EX is currently one of the strongest tournament picks — its favored matchups against EX-heavy attackers and Stage 2 midrange cover a meaningful share of the expected field. Bring it if the meta you are reading is heavy on those archetypes.

How long does a game with Mega Steelix EX & Indeedee EX usually take?

Most games end inside the Pokémon TCG Pocket turn clock once Mega Steelix EX is online. The slow games are the ones where you miss the evolution or energy attachment on the key turn — those usually decide themselves before turn six.