Tropical Tidal WaveHGSS Black Star Promos · #HGSS18/25 · Promo · 2010
The Hoshino Verdict
What this card’s market is actually doing — scored, stated and kept current.
Hoshino holds 1 confirmed sale of this card, none of them in the last 12 months. That is too thin to call a trend, so we do not call one. The most recent sale we hold is 20 months old.
Why is it expensive? It prices in the top 1% of the catalogue because it is a promo from HGSS Black Star Promos (2010).
Verdict recomputed 8m ago · it changes as the market does.
Tropical Tidal Wave is card HGSS18 of 25 in HGSS Black Star Promos, released in 2010 as part of the HeartGold & SoulSilver series. It is a Promo card, illustrated by Sumiyoshi Kizuki.
We hold 1 confirmed sale on record for this card across 2 venues — every price on this page traces back to them.
Descriptive market data, not investment advice. The Hoshino Score measures how deep, liquid, widely-traded, dear and scarce this card’s market is from sales and population records we hold. It is not a forecast, not a recommendation, and not a rating of this card as an investment.
Price by grade
What each grade’s real sales say — median of what actually sold.
Each grade is priced on the median of its own real sales — never averaged across grades, and never across printings. A 1st Edition, Shadowless or No Rarity copy is a different market from the ordinary print, so it gets its own row; where a grade holds sales of more than one printing and we cannot tell which copy sold, it is shown without a price — we abstain rather than publish the blend.
| Tier | Price | Confidence | Liquidity | Basis | Obs. |
|---|---|---|---|---|---|
| Raw (ungraded) | $368 | — | — | market estimate (guide) | 2 |
| PSA 8 | — | — | none in 90d | 1 sale · single sale | 1 |
| PSA 9 | $560 | — | — | modeled est. est. from PSA 8 × 1.6 | |
| PSA 10 | $1,400 | — | — | modeled est. est. from PSA 8 × 2 |
Cross-market comparisons and arbitrage routes are computed within one grade — PSA 10 against PSA 10, raw against raw. A route is never built from two different grades.
Price trend
Median market price over time, plus the sale-by-sale receipts.
Daily snapshot medians · US market · raw bucket.
Recent sales
| Sold | Venue | Region | Grade | Price | |
|---|---|---|---|---|---|
| 2025-01-30 19mo ago | 🇺🇸 Goldin | North America | PSA 8 | $350 | view ↗ |
| 2026-09-15 5d ago | 🇪🇺 Cardmarket guide | Europe | NM | €306.81 · $356 | |
| 2025-09-17 12mo ago | 🇺🇸 TCGplayer guide | North America | NM | $600 |
The 3 most recent — confirmed sales first, then estimates; distinct price points, identical re-ingested rows count once, never stacked. Venue is the marketplace the sale actually cleared on — eBay, Goldin, ALT, Fanatics, SNKRDUNK and the rest — established from the sale’s own listing URL, its auction house, or the feed’s own declaration of the venue. A via tag names the data feed that delivered the record; the feed is never the venue. Where none of those establish a marketplace the row says venue not disclosed rather than naming one we cannot prove. Rows tagged guide are marketplace price-guide points (TCGplayer market / Cardmarket trend), not confirmed sales; rows tagged est. are inferred from a listing that left the market, not directly-recorded sales. Rows tagged recorded come from a venue that publishes no sale date — Mercari Japan publishes none — so the date shown is the day we recorded the sale, an upper bound on when it sold. The price is real either way; we do not invent a date.
See the 30-day, 90-day and 1-year charts and every past sale on record — date, venue, region, grade and the price it actually fetched.
Buy from around the world
The lowest live ask on every platform we track — cheapest first.
Sold around the world
Daily market prices by region and platform — what this card actually changes hands for worldwide, kept apart from seller asks.
Markets are too thin or divergent to quote a reliable cross-border spread on this card yet.
Per-platform sold history builds as feeds report — the value above is the honest anchor we hold today.
Should you grade it?
Expected grade × daily market prices − grading fees = net value, per grader.
See the full grader ladder — chance of a 10, what a 10 and a 9 actually fetch, and the fee, expected value and ROI on every route.
Should you grade it? Every grader route, your cost basis, and Japan vs the West → · or scan a photo of your copy
Who is looking at this card
Demand and supply signals that move before price does.
This is where the attention layer goes: how much YouTube activity this card is getting (demand) against how many copies are listed for sale right now (supply). Rising demand into falling supply is the setup that moves before the price does — the leading indicator this category does not have.
We hold no readings for this card, so there is no number here. The model is built (src/attention); the collector has not run against this database yet, and until it has, an attention score would be something we made up. A blank panel that says so is the honest version of this section.
Long-term outlook
Transparent scenario model from real solds, supply and demand — bands widen with time.
See where this card is projected to be in 10 years — scenario bands, every horizon, and the long-term verdict.
Scenario projection based on demand/supply trends and known catalysts. Not investment advice and not a guarantee of future prices.
More from HGSS Black Star Promos
Same set, same shelf.
Frequently asked questions
Answered from the data on this page — nothing here is written by hand.
Is Tropical Tidal Wave (HGSS Black Star Promos #HGSS18) going up or down in price?
Tropical Tidal Wave (HGSS Black Star Promos #HGSS18) is trending up in price. 30-day change: 0%. Based on live market data tracked on Hoshino.
📛 Get the price badge
Embeddable price badges for Tropical Tidal Wave — pick the look, copy, paste. Live global data no US-only rival can show.
Drop any of these into a listing, blog or forum signature. Each shows the live number with its honest basis — real market price with sale-count provenance, or a clearly labelled guide estimate — and updates as new sales land (cached 1 hour). Add ?theme=light for light backgrounds.
Track Tropical Tidal Wave in your portfolio — free
Live value across every market we track, grade-EV on your exact copy, and alerts the second the price moves.