HeartGold SoulSilver · 2010
Professor Oak's New Theory 101/123
$0.71
TCGplayer market price for a near-mint, ungraded Professor Oak's New Theory from HeartGold SoulSilver, -6.6% over 30 days, as of November 11, 2026.
- 7-day change
- -1.4%
- 30-day change
- -6.6%
- Rarity
- Uncommon
- Number
- 101/123
- Illustrator
- Ken Sugimori
Professor Oak's New Theory price history
Since October 14, 2026: low $0.71, high $0.76. Recorded by Hyper Rare each time the market price updates.
| Printing | Market price |
|---|---|
| Reverse Holofoil | $6.99 |
| Normal | $0.71 |
What’s it worth in a trade?
At $0.71, Professor Oak's New Theory trades about even with:
-
Pikachu
$0.72
-
Mega Darkrai ex
$0.72
-
Mega Greninja ex
$0.72
-
Jamming Tower
$0.72
Trading for Professor Oak's New Theory?
Check the deal before you swap.
Add what you’re giving and the free trade calculator tells you if it’s fair. Scan cards and track your collection’s value in the Hyper Rare app.
Other Professor Oak's New Theory cards
How much is Professor Oak's New Theory 101/123 from HeartGold SoulSilver worth?
Professor Oak's New Theory (101/123) from HeartGold SoulSilver has a TCGplayer market price of $0.71 for a near-mint, ungraded copy as of November 11, 2026. By printing: Reverse Holofoil $6.99 and Normal $0.71.
Is Professor Oak's New Theory 101/123 going up in value?
Professor Oak's New Theory is down 6.6% over the last 30 days, from Hyper Rare's price snapshots. Since October 14, 2026 it has ranged from $0.71 to $0.76.
What is Professor Oak's New Theory 101/123 worth in a trade?
At $0.71, it trades about even with Pikachu (30th Celebration, $0.72), Mega Darkrai ex (Pitch Black, $0.72), Mega Greninja ex (Chaos Rising, $0.72), and Jamming Tower (Ascended Heroes, $0.72).
How many Professor Oak's New Theory cards are there?
Hyper Rare tracks 2 priced Professor Oak's New Theory cards. The most valuable other one is Professor Oak's New Theory from Call of Legends at $0.95.