HeartGold SoulSilver · 2010
Professor Oak's New Theory 101/123
$0.76
TCGplayer market price for a near-mint, ungraded Professor Oak's New Theory from HeartGold SoulSilver, as of October 14, 2026.
- Rarity
- Uncommon
- Number
- 101/123
- Illustrator
- Ken Sugimori
Professor Oak's New Theory price history
Hyper Rare records this card’s market price each time it updates (first recorded October 14, 2026). The chart and 7, 30 and 90-day changes appear here as the history builds. The Hyper Rare app shows longer price history for any card you scan.
| Printing | Market price |
|---|---|
| Reverse Holofoil | $6.99 |
| Normal | $0.76 |
What’s it worth in a trade?
At $0.76, Professor Oak's New Theory trades about even with:
-
Mega Chandelure ex
$0.77
-
Luxray ex
$0.77
-
Revavroom ex
$0.76
-
Cornerstone Mask Ogerpon ex
$0.76
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 $0.76 for a near-mint, ungraded copy as of October 14, 2026. By printing: Reverse Holofoil $6.99 and Normal $0.76.
What is Professor Oak's New Theory 101/123 worth in a trade?
At $0.76, it trades about even with Mega Chandelure ex (Pitch Black, $0.77), Luxray ex (Twilight Masquerade, $0.77), Revavroom ex (Obsidian Flames, $0.76), and Cornerstone Mask Ogerpon ex (Twilight Masquerade, $0.76).
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 $1.15.