Pokémon · HeartGold SoulSilver
Professor Oak's New Theory
French name: Nouvelle théorie du Prof. Chen
Professor Oak's New Theory (HeartGold SoulSilver 101/123) has a market price of US$0.71 to US$6.99 as of Nov 10, 2026.
Price guide
The market price on TCGplayer, in US dollars: a guide, not an offer.
Market price
As of Nov 10, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.
Card details
- Type
- Trainer - Supporter
- HP
- 0
- Stage
- Supporter
- Retreat cost
- 0
- Artist
- Ken Sugimori
Card text
You can play only one Supporter each turn. When you play this card, put it next to your Active Pokemon. When your turn ends, discard this card.
Attacks
Shuffle your hand into your deck. Then, draw 6 cards.
About this card
Professor Oak's New Theory is card 101/123 in HeartGold SoulSilver, a Pokémon set released Feb 10, 2010. Rarity: Uncommon. Finishes: Normal, Reverse Holofoil. Illustrated by Ken Sugimori. Reference market price on Nov 10, 2026: US$0.71 (Normal), US$6.99 (Reverse Holofoil). Over the last 30 days, the Normal price went down 4.1%. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.
Other printings
- Professor Oak's New Theory (League Promo)101/123League & Championship Cards · US$39.65
- Professor Oak's New Theory - 2012 (Chase Moloney)83/95World Championship Decks · US$1.25
- Professor Oak's New Theory068/070L1: HeartGold Collection · US$1.00
- Professor Oak's New Theory - 2012 (Shuto Itagaki)83/95World Championship Decks · US$1.00
- Professor Oak's New Theory83/95Call of Legends · US$0.95
- Professor Oak's New Theory - 2011 (Ross Cawthon)83/95World Championship Decks · US$0.85
- Professor Oak's New Theory - 2010 (Yuta Komatsuda)101/123World Championship Decks · US$0.80
- Professor Oak's New Theory - 2011 (Christopher Kan)101/123World Championship Decks · US$0.67
