Professor Oak's New Theory #101 (Reverse Holo) — HeartGold & SoulSilver

PriceCharting market prices as of 2026-10-20:

TCGplayer market price: $6.99 (as of 2026-10-20)

Market context: ungraded price +30.7% over 30 days. -3.3% over 90 days.

More from HeartGold & SoulSilver

• Professor Elm's Training Method #100
• Professor Elm's Training Method #100
• Professor Oak's New Theory #101
• Psychic Energy #119
• Quagsire #9
• Quagsire #9

Live charts, history, and collection tools: https://tcginsider.net/sets/pokemon-heartgold-%26-soulsilver/pokemon-heartgold-%26-soulsilver-professor-oak-s-new-theory-reverse-holo-101