Gastrodon
Steam Siege · #29

Gastrodon

Gastrodon is a Rare Pokémon TCG printing from Steam Siege (#29). Cactaur's latest catalog snapshot shows a TCGPlayer market reference near $0.80 for ungraded copies. The set released in 2016. Scan your copy in the Cactaur app for condition-aware pricing.

Steam Siege set collectorsEvolution line completers UnlimitedExpanded
TCGPlayer market $0.80
Cardmarket trend €0.30
Rarity Rare
App coming soon

Who is this card for?

Gastrodon suits collectors working on Steam Siege who need the Rare slot. Compare listing photos to your target finish; skip impulse buys when variant or wear is unclear. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

What is Gastrodon from Steam Siege?

Gastrodon is a Pokémon card in Steam Siege numbered 29. It apparently had a huge shell for protection in ancient times. It lives in shallow tidal pools. National Pokédex #423. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

What is Gastrodon worth today?

Cactaur tracks a TCGPlayer market reference near $0.80 for Gastrodon. Low and high spread runs $0.40 to $19.98. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

SetSteam Siege
Number29
RarityRare
TCGPlayer USD$0.80
Cardmarket EUR€0.30

Gameplay stats

HP110
TypesWater
Evolves fromShellos
Sticky Shot Water 20 During your opponent's next turn, the Defending Pokémon's attacks cost Colorless more, and its Retreat Cost is Colorless more.
Water Pulse WaterWaterWater 60 Your opponent's Active Pokémon is now Asleep.
WeaknessGrass ×2

How collectible is Gastrodon?

Gastrodon is listed as Rare in Steam Siege. Set collectors, type collectors, and art buyers may value this card differently — confirm variant before paying chase premiums. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

What are the key details for Gastrodon?

Catalog fields: set Steam Siege, rarity Rare. Illustrated by Aya Kusube. Format status: Expanded. Cross-check holo pattern and language when buying online. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

Cactaur's take

Gastrodon from Steam Siege should be evaluated with set context, finish, and condition together.

Pros

  • Gastrodon is catalogued as Rare printing in Steam Siege, making set and number verification straightforward.
  • Public market data shows a TCGPlayer reference near $0.80.

Cons

  • Raw market prices vary by condition, language, and holo variant — NM estimates are not slab grades.

Verdict: Use $0.80 as a benchmark, then adjust for finish, grade, and how quickly you need to buy or sell.

FAQ

How much is Gastrodon worth?

Cactaur's catalog shows a TCGPlayer market reference near $0.80 for ungraded Gastrodon from Steam Siege. Actual value depends on condition, language, and finish such as holo or reverse holo. Scan your card in the Cactaur app for a tailored estimate.

What set is Gastrodon from?

Gastrodon is listed in Steam Siege (XY) as card #29. Always match both name and collector number because many Pokémon share names across sets. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

How rare is Gastrodon?

Our catalog lists Gastrodon as Rare in Steam Siege. Rarity guides pull rates but does not alone determine price — chase art, demand, and condition matter.

Is Gastrodon good for collectors or players?

Gastrodon includes gameplay stats in Steam Siege. Players should review format legality; collectors often prioritize set symbol, number, and visual variant over raw power. Verify finish, condition, and listing photos before paying above recent market references in the Cactaur catalog.

Related cards

Trust & data sources. Cactaur displays catalog and market data from pokemontcg.io embedded TCGPlayer/Cardmarket references. Prices change frequently and are not guarantees.

Cactaur does not authenticate cards or guarantee values. Scan your copy in the iPhone app for condition-aware guidance.

Catalog snapshot: 2026-06-11. Last updated: 2026-06-10.