
Pokemon market · Pokemon index
Tentacool Price Index
The Tentacool Price Index closed at 4,081.22 on October 18, 2026, up 3.70% over 30 days. It follows 32 English Tentacool cards and started at 1,000 on January 20, 2025.
Updated October 18, 2026 · refreshed daily
- 7D-0.60%
- 30D+3.70%
- 1Y+195.75%
Index total value of 32 priced cards: $340.17
Full history
Since January 20, 2025, base 1,000
View daily values (637 days)
| Date | Level | Status |
|---|---|---|
| 4,081.22 | Published | |
| 4,065.39 | Published | |
| 4,065.51 | Published | |
| 4,069.35 | Published | |
| 4,104.62 | Published | |
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| 1,008.40 | Published | |
| 1,000.60 | Published | |
| 1,000.00 | Published |
Index summary
The index was down 0.60% over 7 days, up 3.70% over 30 days, and up 195.75% over one year. On October 18, 2026 its 32 cards had a combined value of $340. The most valuable was Tentacool [Reverse Holo] from Pokemon Legendary Collection, at $169.05. The largest 7-day gain among its cards was Tentacool [Reverse Holo], up 6.99% over 7 days.
Index summaries are informational only and not financial advice. Past performance does not guarantee future results.
Index facts
| Started | January 20, 2025 at 1,000 |
|---|---|
| Cards in the index | 32 |
| 32 of 32 | |
| $340.17 | |
| Methodology | Set and Pokemon indexes |
Biggest 7-day moves
Among cards in this index
Largest gains
| Card | Price | 7D |
|---|---|---|
| $16.53 | +6.99% |
Largest declines
| Card | Price | 7D |
|---|---|---|
| $2.64 | -19.02% | |
| $32.72 | -6.51% | |
| $1.56 | -3.11% | |
| $2.61 | -0.76% | |
| $15.79 | -0.75% |
Most valuable cards
All 32 cards. Prices are the daily market price from US online marketplace data.
Value by era
| Era | Cards | Value | Share |
|---|---|---|---|
| Wizards of the Coast | 10 | $251.99 | 74.1% |
| EX | 4 | $52.81 | 15.5% |
| Diamond & Pearl | 2 | $5.49 | 1.6% |
| HeartGold & SoulSilver | 2 | $7.46 | 2.2% |
| XY | 4 | $20.04 | 5.9% |
| Sun & Moon | 4 | $1.12 | 0.3% |
| Sword & Shield | 2 | $0.36 | 0.1% |
| Scarlet & Violet | 2 | $0.46 | 0.1% |
| Other | 2 | $0.44 | 0.1% |
Evolution line and related indexes
- Headline index for this era: DH Vintage 100
- All Tentacool cards and prices
- Every Pokemon price index
Frequently asked questions
What is the Tentacool Price Index?
The Tentacool Price Index is a daily index from Double Holo Research that follows the combined price of every priced English Tentacool card. It started at 1,000 on January 20, 2025 and was at 4,081.22 on October 18, 2026.
Are Tentacool cards going up in value?
Double Holo does not forecast prices. As of October 18, 2026, the Tentacool Price Index was up 3.70% over 30 days and up 195.75% over one year.
What is the most valuable Tentacool card?
Tentacool [Reverse Holo] from Pokemon Legendary Collection had the highest price in the index on October 18, 2026, at $169.05.
How is the Tentacool Price Index calculated?
It adds up the daily market price of every card in the index. Each day the change is measured only on cards that were in the index on both days, so a card that joins never moves the level on its first day. A day is published when cards making up at least 90% of the index value have a recent price.
Can I download the Tentacool Price Index data?
Yes. The full daily history is a free CSV file under the CC BY 4.0 license, one row for every day with its status. Credit: Double Holo Research, doubleholo.com/pokemon-market.
Download the data
Tentacool Price Index daily history (CSV): date, level, total value, and priced cards for every day, with its status, free under CC BY 4.0.
How it is built
The combined price of every card in the index, starting at a base of 1,000 points. It compares each day's prices with the day before, using only cards in the index on both days. Methodology · Market overview
The Tentacool Price Index closed at 4,081.22 on October 18, 2026, up 3.70% over 30 days.
Index levels from Double Holo Research, computed from the daily market price from US online marketplace data.
Double Holo, Tentacool Price Index, October 2026, https://doubleholo.com/pokemon-market/pokemon/tentacool
Index levels are points, base 1,000. Prices in USD (shown in your preferred currency when set), from the daily market price from US online marketplace data, compiled by Double Holo Research.
Follow the cards behind the indexes
Add Chase 100 cards and sealed products to a free Double Holo watchlist to see their daily prices and moves in one place.