Professor Oak's New Theory
HeartGold SoulSilver · 101/123
Market value
Prices as of October 9, 2026 (Europe) and October 8, 2026 (United States).
Europe · EUR
- 7-day average
- €0.25
- 30-day average
- €0.20
- Lowest listing
- €0.02
CM Trend ≈ £0.19 · $0.26, converted at ECB rate of October 8, 2026.
United States · USD
- Lowest listing
- $0.25
- Median listing
- $0.75
- Highest listing
- $20.00
TCG Market ≈ €0.67 · £0.57, converted at ECB rate of October 8, 2026.
CM Trend, last 30 days
€0.18 on September 10, 2026, €0.23 on October 9, 2026 (+28%).
TCG Market, last 30 days
$0.75 on October 8, 2026, $0.75 on October 9, 2026 (0%).
Versions
| Version | EuropeCM Trend | USTCG Market |
|---|---|---|
| Normal | €0.23 | $0.75 |
| Normal · Chase Moloney stamp | – | – |
| Normal · Christopher Kan stamp | – | $0.67 |
| Normal · David Cohen stamp | €8.99 | – |
| Normal · Gustavo Wada stamp | – | $0.49 |
| Normal · Igor Costa stamp | – | $33.75 |
| Normal · Ross Cawthorn stamp | – | – |
| Normal · Shuto Itagaki stamp | – | – |
| Normal · Yuta Komatsuda stamp | €1.99 | $0.80 |
| Normal · Zachary Bokhari stamp | €0.74 | – |
| Reverse holo | €2.74 | $6.96 |
| Reverse holo · Professor Program | – | $0.40 |
Where it stands
- Overall#14,186 of 25,282 priced cards
- Set#97 of 110 in HeartGold SoulSilverTop 25 in HeartGold SoulSilver
- Uncommon#32 of 37 with this rarity in HeartGold SoulSilver
Ranked by CM Trend among all Pokémon cards.
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Card effect
You can play only one Supporter card each turn. When you play this card, put it next to your Active Pokémon. When your turn ends, discard this card. Shuffle your hand into your deck. Then, draw 6 cards.
Card details
- Number
- 101/123
- Rarity
- Uncommon
- Category
- Trainer
- HP
- 0
- Illustrator
- Ken Sugimori
- Legal in
- Neither Standard nor Expanded
- Variants
- Normal, Reverse holo
About this card
Professor Oak's New Theory is a Trainer card from HeartGold SoulSilver, card number 101/123. Its rarity is Uncommon. HeartGold SoulSilver was released in 2010 as part of the HeartGold & SoulSilver series. In Europe its CM Trend is €0.23, with a 30-day average of €0.20. In the United States its TCG Market price is $0.75.