Professor Oak's New Theory

HeartGold & SoulSilver · No. 101/123

Uncommon EN Trainer

Current value

$6.96

TCGplayer Near Mint

Prices

Variant	TCGplayer	Cardmarket
Normal	$0.80 Low $0.25 · High $20.00	€0.19
Reverse Holofoil	$6.96 Low $4.28 · High $63.10	No price

TCGplayer prices are Near Mint market averages, Cardmarket prices are 30-day averages in EUR. Refreshed every 15 minutes, as of Sep 16, 2026, 5:50 AM UTC.

Details

Rarity

Uncommon

Artist

Ken Sugimori

Number

101/123

Expansion

HeartGold & SoulSilver

Series

HeartGold & SoulSilver

Subtypes

Supporter

Price history

TCGplayer Cardmarket

$6.96 +$0.04 (+0.6%)

$6.92 $6.93 $6.94 $6.95 $6.96

Sep 9 Sep 11 Sep 12 Sep 14 Sep 15

Reverse Holofoil · TCGplayer Near Mint · last 7 days, average price by day

Date	Average
Sep 9, 2026	$6.92
Sep 10, 2026	$6.92
Sep 11, 2026	$6.92
Sep 12, 2026	$6.92
Sep 13, 2026	$6.96
Sep 14, 2026	$6.96
Sep 15, 2026	$6.96

7D 1M 3M 6M 1Y

Normal Reverse Holofoil

Where to buy

TCGplayer Search Professor Oak's New Theory on TCGplayer Cardmarket Search Professor Oak's New Theory on Cardmarket eBay Search Professor Oak's New Theory on eBay

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Professor Oak's New Theory is card 101/123 of HeartGold & SoulSilver, a HeartGold & SoulSilver series English Pokémon TCG expansion. Prices and price history here come from TCGplayer and Cardmarket and refresh every 15 minutes, and you can scan and track your HeartGold & SoulSilver cards in the Arca TCG app.