During your opponent's next turn, the Defending Pokémon's attacks cost Colorless more, and its Retreat Cost is Colorless more.
Your opponent's Active Pokémon is now Asleep.
Steam Siege was released in 2016. Series classification for this set is XY.
Set size is 116 cards, which categorizes Steam Siege as mid-size. As of 2026, the set is 10 years old and now falls into an established back-catalog period.
Within this set, Gastrodon is card number 29 with a Rare designation.
In 2016, Steam Siege introduced this print of Gastrodon. The printed flavor text states: "It apparently had a huge shell for protection in ancient times.
It lives in shallow tidal pools." Its card type is Pokémon. The rarity label is Rare.
Printed HP is 110. Energy typing is Water.
This gives collectors a clear identity footprint for the print. As an evolution, Gastrodon develops from Shellos.
Gastrodon from Steam Siege is currently trading around $0.45. Compared with last week, pricing is 2.2% lower.
Versus its 30-day baseline of $0.46, this card is now 2.2% lower. In the past 90 days, observed prices ranged from $0.39 to $0.47 (18% spread), a low-volatility profile.
This version is categorized as Rare.
Other Gastrodon printings create a useful comparison set for Gastrodon. The current sample spans 3 comparable cards from 3 sets.
Observed alternatives run from $0.08 to $0.24 (200% spread). The current card sits +214% versus the sampled alternative average of $0.14.
Notable alternatives include Gastrodon #102 (Lost Origin) at $0.11, Gastrodon #107 (Surging Sparks) at $0.08, and Gastrodon #54 (Crimson Invasion) at $0.24.
Current valuation lens: Recent pricing has softened by 2.2% over 7 days, with the card now 4% below its 90-day high. Observed 90-day bounds of $0.39 and $0.47 create a 18% band, matching a low-volatility profile.
Current value remains close to its 30-day mean ($0.46). Condition sensitivity is substantial: PSA 10 carries a +7678% premium over raw value.
PSA 10 is currently around $35.00.
