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, 1:29 PM UTC.

Details

Rarity

Uncommon

Artist

Ken Sugimori

Number

101/123

Expansion

HeartGold & SoulSilver

Series

HeartGold & SoulSilver

Subtypes

Supporter

Price history

TCGplayer Cardmarket

$0.22 +$0.01 (+4.8%)

$0.16 $0.18 $0.20 $0.22

Sep 9 Sep 10 Sep 12 Sep 13 Sep 15

Reverse Holofoil · Cardmarket average · last 7 days, average price by day

Date	Average
Sep 9, 2026	$0.21
Sep 10, 2026	$0.20
Sep 11, 2026	$0.20
Sep 12, 2026	$0.20
Sep 13, 2026	$0.16
Sep 15, 2026	$0.22

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.