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Check your printing2 different Gastrodon East Sea printings exist — is this your card? Rising Rivals #21
Gastrodon East Sea Rising Rivals #21 Pokémon card
Rare

Gastrodon East Sea

Rising Rivals · 21/111 · Illustrated by Ken Sugimori
90 HPWaterPokémonStage 1

Market value · ungraded

$2.19 2.3% · 30d
Confidencehigh
Range$2$3
Sold prices, not asking. TCGplayer. Updated 20 August 2026. Estimate, not an appraisalhow we price →

What's your copy worth?

What's your copy worth?
Not sure which condition? Grade it from a photo
Estimated value · Near Mint
$2.19

Grade it or not

NOT WORTH IT

Based on 0 graded sales and 1,305,862 pop-report entries for a near-mint copy.

See the numbers — Trader plan and above

Buy this card

ViewingRaw / ungraded (this page)Reverse Holo price

Is it worth it?

An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.

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Gastrodon East Sea is a Rare Pokémon card from Rising Rivals (#21), illustrated by Ken Sugimori. It's a Stage 1 Water-type Pokémon with 90 HP, evolving from Shellos East Sea, weak to Grass +30. Its current blended market value is $2.19 ungraded, with a PSA 10 worth around $96 — a gem-mint grading premium of roughly 44× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.

Prices last updated 20 August 2026.

The receipts

Price history · Raw

22 May 202620 Aug 2026
Latest
$2.19
Period high
$2.26
Period low
$2.08
Change
5.3%
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Recent sold prices

No recent sold listings tracked.

Should you grade it?

$68

Expected return across every likely grade, after fees — the realistic average, not the best case. Only 0% of copies gem (PSA 10 best case +$22); most land at PSA 9 or below.

Gem rate (est.)0%
Expected return$68
PSA 10 best case+$22
Break-evenPSA 10+
VerdictNot worth it

The odds

Gastrodon East Sea is a Rare in Rising Rivals — the pack's hit slot lands on Rare 67% of the time, split across 30 rare cards in the set, so pulling this exact card is roughly 1 in 45 packs.

Rare67%30 cards
PSA 10 (gem mint)0%0 of 3
PSA 9100%3 of 3
PSA graded so far3
Gem Mint 100
Total graded3

Estimates only. Pack odds come from CardTrack's pack model (the same one behind the pack simulator) — not an official rate. Grading odds are the real cumulative PSA population, which skews toward nicer, resubmitted copies, so it overstates the true first-submission gem rate. Full grade-by-grade breakdown below.

Grade-by-grade ROI & risk-adjusted outcomesNet vs raw per target grade, plus the probability-weighted distribution
Target gradeEst. valueGrading feeNet vs rawMultiple
PSA 10$95.56$71+$2243.6×

⚖️ Risk-adjusted return

Best case isn't the whole story. Weighting every grade by how often it actually happens, across 12 PSA-graded copies:

Likely outcomeChanceValue
PSA 100%$96.00
PSA 98.3%$38.00
PSA ≤891.7%$2.00

Net = graded value − raw value − grading cost (tier fee + ~$20 round-trip shipping), using PSA fees as of 2026-06-28; the paused PSA Value tier is excluded so this isn't overstated. Gem rate is estimated from cumulative PSA population, which skews toward nicer, resubmitted copies — so it overstates the true grade rate. Treat it as a guide, not a guarantee.

Population across gradersPSA, CGC & BGS — every grade, with gem rates

Only 0% of 3 PSA-graded Gastrodon East Sea copies are a gem-mint 10 (0 of 3) — the rest grade lower.

PSA3 gradedPSA 10 · 0 · 0% gem
93
CGC12 gradedCGC 10 · 0 · 0% gem
91
8.53
83

Real graded population from PSA, CGC & BGS — a lower gem rate means a Gastrodon East Sea 10 is harder to pull.

Copies for sale right now

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All grades & conditions

Every grade we pricePSA / CGC / BGS ladder with per-grade population
Graded prices
Ungraded (raw)$2.14
PSA graded price estimates by grade
GradeRelative valuePrice
PSA 10$96$96$96
“Sold” = median of real recent sold listings at that grade (eBay or Fanatics Collect — hover a badge to see which). Other figures are blended marketplace estimates. Confidence reflects source backing and price spread — not PSA-official values.
Raw condition ladderNM → damaged, with real sold medians where we have them
Raw price by condition
Reverse Holofoil · live market via TCGplayer
NMNear Mint$2.19
LPLightly Played$1.87
MPModerately Played$1.37
HPHeavily Played$0.69
DMGDamaged$0.43
7-day 0.9%
30-day 1.9%
90-dayflat
All-time high$2
All-time low$1
Other printingsNormal · $2.16
What NM / LP / MP actually mean — and how much they cost
Market dataCross-market spread, EU price, momentum & community buzz

Cross-market prices

39% spread
TCGplayer · cheapest$2
PriceCharting · dearest$3

Currently 39% cheaper on TCGplayer than PriceCharting. These are independent market prices for the same card — a wide gap can mean a buying opportunity. Informational only, not arbitrage advice.

Market signal

Momentum · 30dFlat +2%
Volatility · 90dStable ±2%
Cross-marketMarkets disagree 39% gap
90d low $2near its high$2 high

Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.

Card textAttacks, abilities, weakness / resistance / retreat

Evolves from Shellos East Sea.

Sticky HoldPoké-Body

If Gastrodon East Sea is switched or retreats to your Bench, move as many Energy cards attached to Gastrodon East Sea as you like to the new Active Pokémon.

Calling Wave
Colorless

Search your deck for up to 2 Gastrodon and put them onto your Bench as Basic Pokémon. Put 2 damage counters on each of them. Shuffle your deck afterward.

Wave Splash40
Water · Colorless
Weakness Grass +30Resistance Lightning -20Retreat 1
About the PokémonSpecies, generation, evolution line
Sea Slug PokémonGEN IVShellosGastrodon

It has a pliable body without any bones. If any part of its body is torn off, it grows right back.

Card detailsSet, rarity, artist, Pokédex & specs
Number#21
RarityRare
SupertypePokémon
SubtypesStage 1
TypeWater
HP90
Evolves fromShellos East Sea
WeaknessGrass +30
ResistanceLightning -20
Retreat cost1
National Pokédex#423
Card IDpl2-21
SourceAggregated marketplaces

Other Gastrodon East Sea cards

There are 2 different Gastrodon East Sea printings — make sure you're valuing the right one. This is Rising Rivals #21 (Rare).

More from Rising Rivals

Frequently asked questions

How much is Gastrodon East Sea (Rising Rivals #21) worth?

As of 20 August 2026, Gastrodon East Sea from Rising Rivals is worth approximately $2.19 ungraded (near-mint), and around $96 in PSA 10 gem mint. Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.

What is the PSA 10 price for Gastrodon East Sea?

A PSA 10 (gem mint) Gastrodon East Sea from Rising Rivals is worth around $96 — roughly 44× the raw ungraded value of $2.19.

Should I grade my Gastrodon East Sea?

A PSA 10 sells for about $96 versus $2.19 raw — roughly a 44× uplift. Grading is worth it when that premium comfortably beats the grading fee and the card is clean enough to have a real shot at a 10. See the "Should you grade it?" estimate above for net profit per grade.

Is Gastrodon East Sea rare?

Gastrodon East Sea is a Rare card from Rising Rivals (card #21), illustrated by Ken Sugimori. Its current blended market value is $2.19 ungraded.

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Citation
Gastrodon East Sea (Rising Rivals #21) — Pokémon market value $2.19, PSA 10 $95.56. Source: CardTrack, https://cardtrack.com/pokemon/card/rising-rivals/gastrodon-east-sea-21
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<iframe src="https://cardtrack.com/embed/card?id=pl2-21" width="100%" height="160" style="border:0;max-width:460px" title="Gastrodon East Sea price — CardTrack" loading="lazy"></iframe> <p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>