Professor Oak's New Theory
HeartGold SoulSilver (2010), Pokémon, 101/123, Uncommon, art by Ken Sugimori
Normal, Near Mint
$0.71
TCGplayer market price (an average of recent sales)
As of Oct 26 (2 days ago). Unchanged since Oct 23.
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Price trend
For the Normal printing.
Oct 19 $0.73 → Oct 26, 2026 $0.71 −2.7%
Sep 26 $0.75 → Oct 26, 2026 $0.71 −5.3%
Jul 28 $0.89 → Oct 26, 2026 $0.71 −20.2%
Oct 26, 2025 $0.80 → Oct 26, 2026 $0.71 −11.3%
Feb 8, 2024 $0.78 → Oct 26, 2026 $0.71 −9.0%
Vs its set
Over the 90 days to Oct 26, 2026: the Normal printing −20.2%; the median other card in HeartGold SoulSilver +13.8% (123 other cards, each at its tracked printing).
Market details
Record
Price history Feb 8, 2024 to Oct 26, 2026
Price changes, last 30 days
| Date | Price | Change | |
|---|---|---|---|
| Oct 12 | $0.75 → $0.74 | −1.3% | Show on chart |
| Oct 13 | $0.74 → $0.76 | +2.7% | Show on chart |
| Oct 15 | $0.76 → $0.74 | −2.6% | Show on chart |
| Oct 16 | $0.74 → $0.73 | −1.4% | Show on chart |
| Oct 20 | $0.73 → $0.72 | −1.4% | Show on chart |
| Oct 23 | $0.72 → $0.71 | −1.4% | Show on chart |
Same set: HeartGold SoulSilver (124)
Same artist: Ken Sugimori (632)
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Live market
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Newest TCGplayer value: Oct 26, 2026. Prices in USD. Card names and images © their respective publishers. See how these prices are made.