Professor Oak's New Theory
HeartGold SoulSilver #101UncommonIllustrated by Ken Sugimori
Prices by version
| Version | Market | Low to high |
|---|---|---|
| Normal | $0.71 | $0.25 to $20.00 |
| Reverse Holo | $6.99 | $4.00 to $62.84 |
| Reverse Holo · Professor Program Foil | No price yet | |
| Normal · Yuta Komatsuda Stamp | No price yet | |
| Normal · Gustavo Wada Stamp | No price yet | |
| Normal · Christopher Kan Stamp | No price yet | |
| Normal · Igor Costa Stamp | No price yet | |
| Normal · Chase Moloney Stamp | No price yet | |
| Normal · Ross Cawthorn Stamp | No price yet | |
| Normal · David Cohen Stamp | No price yet | |
| Normal · Shuto Itagaki Stamp | No price yet | |
| Normal · Zachary Bokhari Stamp | No price yet |
TCGplayer market prices for Near Mint copies, as of October 27, 2026. Each version is priced on its own.