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Pokémon · League & Championship Cards · Promo
Professor Oak's New Theory (League Promo) 101/123 Price
Professor Oak's New Theory (League Promo) (101/123, Promo) from League & Championship Cards is worth $32.50 in Near Mint condition on TCGplayer as of October 3, 2026.
- Near Mint · TCGplayer
- $32.50
- Near Mint · Cardmarket
- —
- 30-day change
- −0.8%
- Printings
- 1
Professor Oak's New Theory (League Promo) prices by printing
Near Mint market prices, updated October 3, 2026.
| Printing | TCGplayer (USD) | Cardmarket (EUR) |
|---|---|---|
| Reverse Holofoil | $32.50 | — |
TCGplayer market price and Cardmarket price for Near Mint English copies. They are two separate markets, so the euro figure is Cardmarket's own price, not a conversion of the dollar one. Source: TCGplayer, Cardmarket.
Professor Oak's New Theory (League Promo) price history
Near Mint Reverse Holofoil on TCGplayer, last 30 days.
−0.8%
Card details
- Card number
- 101/123
- Rarity
- Promo
- Released
- June 1, 2016
- Illustrator
- Ken Sugimori
- Card type
- Supporter
- Card text
- You can only play 1 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.
Professor Oak's New Theory (League Promo): common questions
How much is Professor Oak's New Theory (League Promo) 101/123 worth?
Professor Oak's New Theory (League Promo) (101/123, Promo) from League & Championship Cards is worth $32.50 in Near Mint condition on TCGplayer as of October 3, 2026.
What set is Professor Oak's New Theory (League Promo) from?
Professor Oak's New Theory (League Promo) is card 101/123 in League & Championship Cards, released June 1, 2016. Its rarity is Promo. Illustrated by Ken Sugimori.
Is Professor Oak's New Theory (League Promo) going up in price?
Over the last 30 days the Near Mint Reverse Holofoil price on TCGplayer moved from $32.75 (September 16, 2026) to $32.50 (October 3, 2026), a change of −0.8%. The 30-day low was $32.50 and the high $32.75.
How do I check what my Professor Oak's New Theory (League Promo) is worth?
Scan it with the TCG Vault app on iPhone: it identifies the card from the camera in seconds and shows its current market price and price history, then keeps it in your collection so you can follow its value.
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