Professor Oak's New Theory
HeartGold & SoulSilver · #101 · Uncommon
$6.92US · TCGplayer
$0.29EU · Cardmarket
+17%7-day (EU)
+35%30-day (EU)
Market read: heating up — +17% in 7 days; +35% over 30 days; a steady climb built over the month, not a one-week pop — the kind of move that tends to hold; notably pricier in the US.
#81 most valuable of 124 cards in HeartGold & SoulSilver.
TCGplayer range: low $4.00 · market $6.92 · high $63.10 (reverseHolofoil)
Prices datamined 2026-06-12. The 7/30-day trend is Cardmarket (EU) — an early momentum signal, not a guarantee.