Steam Siege

Series: XY

Release date: August 3, 2016

Cards: 114 (2 secret)

Set code: XY11

Dual-type Pokémon return with this expansion, eight in all, each carrying two type symbols beside the HP and a diagonal line across the card with one type's colour on either side of it. Shiftry pairs Grass with Darkness, Bisharp pairs Darkness with Metal, Azumarill pairs Fairy with Water, and the three that also received Full Arts are Volcanion-EX, M Steelix-EX and M Gardevoir-EX. Volcanion is the Mythical Pokémon the release is built around, and Mitsuhiro Arita painted both of its gold secrets, a Volcanion-EX and a Gardevoir-EX. Xerneas BREAK and Yveltal BREAK are the pair the packaging sets against each other. Japan split the cards into Fever-Burst Fighter and Cruel Traitor in June 2016, the last two expansions of its XY BREAK Era. That leaves this as the final new expansion of the XY Series, since Evolutions after it is drawn mostly from Base Set reprints. Steam Siege (XY11) was released on August 3, 2016 in the XY series, with 114 cards plus 2 secret rares. Its most expensive card is Gardevoir EX #116 (Secret Rare), at $70.15 (median of 6 sales over 7 days, September 30, 2026). A sealed booster box sells for $1,158.62 (median of 5 sales over 30 days, September 25, 2026).

Steam Siege Card List

116 cards · 4 products

Tangela

Steam Siege

Common - #1/114

$0.18

Tangrowth

Steam Siege

Uncommon - #2/114

$0.05

Hoppip

Steam Siege

Common - #3/114

$0.11

Skiploom

Steam Siege

Uncommon - #4/114

$0.10

Jumpluff

Steam Siege

Rare - #5/114

$0.17

Yanma

Steam Siege

Common - #6/114

$0.09

Yanmega

Steam Siege

Rare - #7/114

$0.19

Yanmega BREAK

Steam Siege

Rare BREAK - #8/114

$2.87

Seedot

Steam Siege

Common - #9/114

$0.09

Nuzleaf

Steam Siege

Uncommon - #10/114

$0.08

Shiftry

Steam Siege

Rare Holo - #11/114

$1.58

Foongus

Steam Siege

Common - #12/114

$0.10

Amoonguss

Steam Siege

Rare - #13/114

$0.29

Larvesta

Steam Siege

Common - #14/114

$0.11

Volcarona

Steam Siege

Rare - #15/114

$1.56

Ponyta

Steam Siege

Common - #16/114

$0.12

Rapidash

Steam Siege

Uncommon - #17/114

$0.19

Chimchar

Steam Siege

Common - #18/114

$0.09

Monferno

Steam Siege

Uncommon - #19/114

$0.18

Infernape

Steam Siege

Rare Holo - #20/114

$0.89

Talonflame BREAK

Steam Siege

Rare BREAK - #21/114

$4.07

Litleo

Steam Siege

Common - #22/114

$0.10

Pyroar

Steam Siege

Rare - #23/114

$0.19

Pyroar BREAK

Steam Siege

Rare BREAK - #24/114

$3.91

Volcanion

Steam Siege

Rare - #25/114

$0.78

Volcanion EX

Steam Siege

Rare Holo EX - #26/114

$2.51

Mantine

Steam Siege

Common - #27/114

$0.11

Shellos

Steam Siege

Common - #28/114

$0.14

Gastrodon

Steam Siege

Rare - #29/114

$0.47

Oshawott

Steam Siege

Common - #30/114

$0.12

Dewott

Steam Siege

Uncommon - #31/114

$0.12

Samurott

Steam Siege

Rare - #32/114

$0.44

Clauncher

Steam Siege

Common - #33/114

$0.10

Clawitzer

Steam Siege

Rare - #34/114

$0.33

Clawitzer BREAK

Steam Siege

Rare BREAK - #35/114

$2.94

Bergmite

Steam Siege

Common - #36/114

$0.09

Avalugg

Steam Siege

Rare - #37/114

$0.44

Mareep

Steam Siege

Common - #38/114

$0.11

Flaaffy

Steam Siege

Uncommon - #39/114

$0.16

Ampharos

Steam Siege

Rare Holo - #40/114

$1.71

Joltik

Steam Siege

Common - #41/114

$0.08

Galvantula

Steam Siege

Rare - #42/114

$0.55

Nidoran♂

Steam Siege

Common - #43/114

$0.28

Nidorino

Steam Siege

Uncommon - #44/114

$0.19

Nidoking

Steam Siege

Rare - #45/114

$1.92

Drifloon

Steam Siege

Common - #46/114

$0.17

Drifblim

Steam Siege

Uncommon - #47/114

$0.05

Litwick

Steam Siege

Common - #48/114

$0.07

Lampent

Steam Siege

Uncommon - #49/114

$0.14

Chandelure

Steam Siege

Rare Holo - #50/114

$1.12

Hoopa

Steam Siege

Rare - #51/114

$0.59

Mankey

Steam Siege

Common - #52/114

$0.10

Primeape

Steam Siege

Rare - #53/114

$0.46

Nosepass

Steam Siege

Common - #54/114

$0.05

Probopass

Steam Siege

Rare - #55/114

$0.35

Anorith

Steam Siege

Uncommon - #56/114

$0.19

Armaldo

Steam Siege

Rare - #57/114

$0.53

Croagunk

Steam Siege

Common - #58/114

$0.06

Toxicroak

Steam Siege

Rare - #59/114

$0.26

Sneasel

Steam Siege

Common - #60/114

$0.08

Weavile

Steam Siege

Rare - #61/114

$0.34

Spiritomb

Steam Siege

Rare - #62/114

$0.21

Pawniard

Steam Siege

Common - #63/114

$0.08

Bisharp

Steam Siege

Rare Holo - #64/114

$1.36

Yveltal

Steam Siege

Rare Holo - #65/114

$0.82

Yveltal BREAK

Steam Siege

Rare BREAK - #66/114

$7.86

Steelix EX

Steam Siege

Rare Holo EX - #67/114

$3.20

M Steelix EX

Steam Siege

Rare Holo EX - #68/114

$7.49

Shieldon

Steam Siege

Uncommon - #69/114

$0.24

Bastiodon

Steam Siege

Rare - #70/114

$0.45

Klink

Steam Siege

Common - #71/114

$0.08

Klang

Steam Siege

Uncommon - #72/114

$0.11

Klinklang

Steam Siege

Rare Holo - #73/114

$0.31

Cobalion

Steam Siege

Rare - #74/114

$0.52

Magearna EX

Steam Siege

Rare Holo EX - #75/114

$2.16

Marill

Steam Siege

Common - #76/114

$0.14

Azumarill

Steam Siege

Uncommon - #77/114

$1.28

Gardevoir EX

Steam Siege

Rare Holo EX - #78/114

$4.86

M Gardevoir EX

Steam Siege

Rare Holo EX - #79/114

$15.70

Klefki

Steam Siege

Uncommon - #80/114

$0.17

Xerneas

Steam Siege

Rare Holo - #81/114

$0.88

Xerneas BREAK

Steam Siege

Rare BREAK - #82/114

$5.66

Druddigon

Steam Siege

Rare - #83/114

$0.36

Deino

Steam Siege

Common - #84/114

$0.09

Zweilous

Steam Siege

Uncommon - #85/114

$0.11

Hydreigon

Steam Siege

Rare Holo - #86/114

$1.08

Hydreigon BREAK

Steam Siege

Rare BREAK - #87/114

$4.90

Meowth

Steam Siege

Common - #88/114

$0.10

Persian

Steam Siege

Uncommon - #89/114

$0.17

Aipom

Steam Siege

Common - #90/114

$0.09

Ambipom

Steam Siege

Uncommon - #91/114

$0.14

Rufflet

Steam Siege

Common - #92/114

$0.09

Braviary

Steam Siege

Uncommon - #93/114

$0.10

Fletchling

Steam Siege

Common - #94/114

$0.09

Fletchinder

Steam Siege

Uncommon - #95/114

$0.09

Talonflame

Steam Siege

Rare - #96/114

$0.70

Hawlucha

Steam Siege

Uncommon - #97/114

$0.08

Armor Fossil Shieldon

Steam Siege

Uncommon - #98/114

$0.08

Captivating Poké Puff

Steam Siege

Uncommon - #99/114

$0.12

Claw Fossil Anorith

Steam Siege

Uncommon - #100/114

$0.12

Gardevoir Spirit Link

Steam Siege

Uncommon - #101/114

$0.10

Greedy Dice

Steam Siege

Uncommon - #102/114

$0.19

Ninja Boy

Steam Siege

Uncommon - #103/114

$0.10

Pokémon Ranger

Steam Siege

Uncommon - #104/114

$0.19

Special Charge

Steam Siege

Uncommon - #105/114

$0.43

Steelix Spirit Link

Steam Siege

Uncommon - #106/114

$0.17

Volcanion EX

Steam Siege

Ultra Rare - #107/114

$8.35

Steelix EX

Steam Siege

Ultra Rare - #108/114

$14.40

M Steelix EX

Steam Siege

Ultra Rare - #109/114

$14.91

Magearna EX

Steam Siege

Ultra Rare - #110/114

$7.84

Gardevoir EX

Steam Siege

Ultra Rare - #111/114

$17.69

M Gardevoir EX

Steam Siege

Ultra Rare - #112/114

$33.45

Pokémon Ranger

Steam Siege

Ultra Rare - #113/114

$9.05

Professor Sycamore

Steam Siege

Ultra Rare - #114/114

$9.82

Volcanion EX

Steam Siege

Secret Rare - #115/114

$19.90

Gardevoir EX

Steam Siege

Secret Rare - #116/114

$70.15

Steam Siege stamped variants (11)

Volcarona (League Challenge 1st Place)

Steam Siege

Rare - #15/114

—

Volcarona (League Challenge 2nd Place)

Steam Siege

Rare - #15/114

—

Volcarona (League Challenge 3rd Place)

Steam Siege

Rare - #15/114

—

Volcarona (League Challenge 4th Place)

Steam Siege

Rare - #15/114

—

Volcanion (League Crosshatch October 2016)

Steam Siege

Rare - #25/114

—

Yveltal (League Crosshatch August 2016)

Steam Siege

Rare Holo - #65/114

—

Xerneas (League Crosshatch September 2016)

Steam Siege

Rare Holo - #81/114

—

Ninja Boy (League Cup Staff)

Steam Siege

Uncommon - #103/114

—

Ninja Boy (League Cup)

Steam Siege

Uncommon - #103/114

—

Pokémon Ranger (Regional Championships 2016-17 Staff)

Steam Siege

Uncommon - #104/114

—

Pokémon Ranger (Regional Championships 2016-17)

Steam Siege

Uncommon - #104/114

—

Steam Siege Sealed Products (4)

Steam Siege Booster

Steam Siege

Pokemon

$25.62

Qty: 0

Steam Siege Elite Trainer Box

Steam Siege

Pokemon

$1,426.89

Qty: 0

Steam Siege Pokemon Booster Box

Steam Siege

Pokemon

$1,158.62

Qty: 0

Steam Siege Sleeved Booster

Steam Siege

Pokemon

$30.99

Qty: 0

Steam Siege Chase Cards

Gardevoir EXSecret Rare · #116$70.15

M Gardevoir EXUltra Rare · #112$33.45

Volcanion EXSecret Rare · #115$19.90

Gardevoir EXUltra Rare · #111$17.69

M Gardevoir EXRare Holo EX · #79$15.70

M Steelix EXUltra Rare · #109$14.91

Steelix EXUltra Rare · #108$14.40

Professor SycamoreUltra Rare · #114$9.82

Pokémon RangerUltra Rare · #113$9.05

Volcanion EXUltra Rare · #107$8.35

See the full Steam Siege chase cards list

Frequently asked questions

When was Steam Siege released?

Steam Siege released on August 3, 2016.

How many cards are in Steam Siege?

Steam Siege contains 114 official cards, plus 2 secret rares and bonus cards, for a total of 116 cards.

How many Secret Rares are in Steam Siege?

There are 2 secret rare cards in Steam Siege.

What is the most expensive card in Steam Siege?

The most expensive card in Steam Siege is Gardevoir EX #116 (Secret Rare), at $70.15: the median of 6 completed sales over the last 7 days, as of September 30, 2026.

How much is a Steam Siege booster box?

A sealed Steam Siege booster box sells for $1,158.62: the median of 5 completed sales over the last 30 days, as of September 25, 2026.

Does Steam Siege include a Pokémon from a generation that had not been released yet?

Yes. Magearna is a Generation VII Mythical Pokémon, and the first Pokémon of that generation to be revealed, in February 2016. It appears twice in Steam Siege, as a regular Magearna-EX and as a Full Art, so the card reached players months before Pokémon Sun and Moon came out in November 2016.