Rillaboom
Market value · ungraded
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Rillaboom is a Promo Pokémon card from SWSH Black Star Promos (#SWSH277), illustrated by DOM. It's a Stage 2 Rapid Strike Grass-type Pokémon with 180 HP, evolving from Thwackey, weak to Fire ×2. Its current blended market value is $0.53 ungraded. 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 near-mint
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Recent sold prices
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The odds
Rillaboom is a Commoncard — a guaranteed slot in every pack, not a rarity gamble, so there's no pull-odds figure for it.
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.
Population across gradersPSA, CGC & BGS — every grade, with gem rates
Only 24% of 21 PSA-graded Rillaboom copies are a gem-mint 10 (5 of 21) — the rest grade lower.
Real graded population from PSA, CGC & BGS — a lower gem rate means a Rillaboom 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
| Grade | Relative value | Price |
|---|---|---|
| CGC 9 | $5$5–$5 | |
| CGC 8.5 | $2$2–$2 |
Raw condition ladderNM → damaged, with real sold medians where we have them
Market dataCross-market spread, EU price, momentum & community buzz
Cross-market prices
112% spreadCurrently 112% cheaper on Cardmarket than TCGplayer. These are independent market prices for the same card — a wide gap can mean a buying opportunity. Informational only, not arbitrage advice.
Market signal
Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.
🇪🇺 Cardmarket price · Europe
53% cheaper than the USCard textAttacks, abilities, weakness / resistance / retreat
Evolves from Thwackey.
Heal 30 damage from this Pokémon.
Discard any amount of Energy from your Pokémon. This attack does 30 more damage for each card you discarded in this way.
“The one with the best drumming techniques becomes the boss of the troop. It has a gentle disposition and values harmony among its group.”
About the PokémonSpecies, generation, evolution line
Card detailsSet, rarity, artist, Pokédex & specs
Other Rillaboom cards
There are 9 different Rillaboom printings — make sure you're valuing the right one. This is SWSH Black Star Promos #SWSH277 (Promo).
More from SWSH Black Star Promos
Frequently asked questions
How much is Rillaboom (SWSH Black Star Promos #SWSH277) worth?
As of 20 August 2026, Rillaboom from SWSH Black Star Promos is worth approximately $0.53 ungraded (near-mint). Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.
Is Rillaboom rare?
Rillaboom is a Promo card from SWSH Black Star Promos (card #SWSH277), illustrated by DOM. Its current blended market value is $0.53 ungraded.
Cite & embed this card
Free to use with attribution to CardTrack.
Rillaboom (SWSH Black Star Promos #SWSH277) — Pokémon market value $0.53. Source: CardTrack, https://cardtrack.com/pokemon/card/swsh-black-star-promos/rillaboom-swsh277<iframe src="https://cardtrack.com/embed/card?id=swshp-SWSH277" width="100%" height="160" style="border:0;max-width:460px" title="Rillaboom price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>