HeartGold SoulSilver

Professor Oak’s New Theory #101/123

UncommonTrainerHP 0

NormalReverse Holo

Current prices

VersionTCGplayer · $Cardmarket · €
Normal$0.73$0.25 – $20.000,23 €From 0,02 €
Reverse Holofoil$6.99$4.00 – $62.922,74 €From 0,49 €

TCGplayer updated yesterday 23:30Cardmarket updated Oct 10, 11:52

Professor Oak’s New Theory, HeartGold SoulSilver #101

Illustrated by Ken Sugimori

Price history

Recorded prices · Jul 20, 2026 – Oct 17, 2026

Cardmarket · Normal
EUR 0.02 – EUR 0.48
6 recorded days · Aug 30, 2026 – Oct 11, 2026
Cardmarket · Reverse Holofoil
EUR 2.66 – EUR 2.74
6 recorded days · Aug 30, 2026 – Oct 11, 2026
TCGplayer · Normal
USD 0.73 – USD 0.91
78 recorded days · Jul 20, 2026 – Oct 16, 2026
TCGplayer · Reverse Holofoil
USD 6.92 – USD 6.99
78 recorded days · Jul 20, 2026 – Oct 16, 2026

Ranges reflect available daily market estimates, not individual sales. Missing days are not filled in. Data & methodology

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