Pokemon Steam Siege Set
A 116-card expansion combining Steam and Gear themes with Mega Steelix EX, Mega Gardevoir EX, and the debut of dual-type Pokemon cards.
xy11 Difficulty
3/5 to complete
Avg Card Value
Varies
Market average
Top Card
Mega Gardevoir EX Full Art
See market
Rarity Tier
Overview
Steam Siege is a 116-card expansion released in August 2016 with a steampunk-inspired gear theme. The set introduced dual-type Pokemon to the TCG, with cards featuring two types simultaneously. Volcanion EX headlined competitively with its Steam Up ability, while Mega Steelix EX and Mega Gardevoir EX served as the collector chase cards.
Best for
- People buying nostalgia sets who need the right Charizard-era print
- collectors pricing Steam Siege (2016, 116 cards) as XY / BREAK / generations nostalgia cardboard — not as generic “old cards”
- buyers who already know Mega Gardevoir EX Full Art / Mega Steelix EX Full Art is the expensive row in Steam Siege
Skip this path if
- you refuse subset tracking and still want a clean master set claim
- you expect every card in Steam Siege to carry similar resale (bulk is bulk)
Common mistakes
The expensive mistake on Steam Siege is paying Evolutions Charizard money without matching the exact print. Set code xy11 (2016) is the membership test — character name alone will not save a bad buy. Budget Mega Gardevoir EX Full Art / Mega Steelix EX Full Art as priority singles; the other 114 cards are not the same project.
What to check first
Pull up Mega Gardevoir EX Full Art / Mega Steelix EX Full Art first — number, finish, and surface — then decide if the ask is real. Parallel check: set symbol and number, especially on nostalgia crossovers people mislabel. Only after that does the full Steam Siege checklist tell you what is left.
Most valuable cards
Mega Gardevoir EX Full Art (#112) is the top collector card at $15-30 near-mint, popular among Gardevoir fans. Mega Steelix EX Full Art (#109) commands $12-25. Volcanion EX Full Art held strong competitive value at $10-15. The secret rare Gardevoir EX (#116) adds a premium chase card to the set.
Cards from Steam Siege
Tap any card to see price history and details.
28 of 116 
Tangela
Tangrowth
Hoppip
Skiploom
Amoonguss
Infernape
Shellos
Bergmite
Nidoran♂
Hoopa
Toxicroak
Steelix EX
Cobalion
Xerneas BREAK
Aipom
Hawlucha
Special Charge
Steelix Spirit Link
Volcanion EX
Steelix EX
M Steelix EX
Magearna EX
Gardevoir EX
M Gardevoir EX
Pokémon Ranger
Professor Sycamore
Volcanion EX
Gardevoir EX
Tips to finish the set
Steam Siege is often considered one of the less exciting XY sets, making sealed product and singles relatively affordable. This makes it an excellent set to complete on a budget. The dual-type cards are visually distinctive and add uniqueness to the collection.
How to Complete This Set
- 01
Identify Steam Siege cards by set code xy11 / symbol — do not sort by art alone
- 02
Split bulk commons/uncommons from holos and special rarities before pricing
- 03
Track Mega Gardevoir EX Full Art and Mega Steelix EX Full Art as priority singles, not pack EV fantasies
- 04
Scan or checklist-gap the rest after the chase budget is honest
Scan with the app
Dual-type cards from Steam Siege have a unique split-color border design that requires proper identification. The scanner recognizes both types on dual-type cards and correctly catalogues them. It also differentiates the Steam Siege Gardevoir EX from its multiple printings in other XY sets.
Common questions
01 What are dual-type Pokemon cards in Steam Siege?
Dual-type cards display two Pokemon types simultaneously, shown by a split-colored card border. For example, a Pokemon might be both Fire and Water type, affecting weakness and resistance calculations in gameplay.
02 Why was Volcanion EX competitively strong?
Volcanion EX's Steam Up ability discarded a Fire Energy from hand to add 30 damage to each of your basic Fire Pokemon's attacks that turn. Combined with baby Volcanion, it created a fast, consistent Fire deck that dominated tournaments.
03 Is Steam Siege an expensive set to collect?
Steam Siege is one of the most affordable XY-era sets. Sealed booster boxes can be found at reasonable prices, and individual singles are generally cheaper than comparable cards from other XY expansions.
04 How many dual-type Pokemon are in Steam Siege?
Steam Siege introduced 12 dual-type Pokemon cards, spanning various type combinations. These were the first official dual-type cards in the modern Pokemon TCG and remain unique to this set.
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