Professor Oak's New Theory #101 HeartGold & SoulSilver Reverse Holofoil Price

Professor Oak's New Theory #101 price, trend & prediction

Professor Oak's New Theory #101 (Reverse Holofoil, Uncommon) from HeartGold & SoulSilver (2010) has a market price of $6.96 raw as of October 11, 2026, the TCGplayer market price for this exact printing. For context, the median HeartGold & SoulSilver card is $8.60; this one ranks #128 of 229 priced printings. Over the last 30 days the price has held steady (+0.6%), +0.6% over 90 days. Its 180-day range is $6.92 to $6.96 — it is trading near the top of that range.

Professor Oak's New Theory #101 price prediction: if recent momentum continues, the 30-day trend for this card is sideways. Momentum is flat: the price has barely moved across the windows we track (+0.6% over 30 days, +0.0% over 7 days, +0.6% over 90 days). This is a read of past price moves, not a model forecast and not investment advice — see the forecast methodology and public accuracy scoreboard for how our ML outlooks are built and scored.