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, 5:09 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

Jun 18 Jul 10 Aug 2 Aug 24 Sep 15

Reverse Holofoil · TCGplayer Near Mint · last 90 days, average price by day

Date	Average
Jul 18, 2026	$6.92
Jul 19, 2026	$6.92
Jul 20, 2026	$6.92
Jul 21, 2026	$6.92
Jul 22, 2026	$6.92
Jul 23, 2026	$6.92
Jul 24, 2026	$6.92
Jul 25, 2026	$6.92
Jul 26, 2026	$6.92
Jul 27, 2026	$6.92
Jul 28, 2026	$6.92
Jul 29, 2026	$6.92
Jul 30, 2026	$6.92
Jul 31, 2026	$6.92
Aug 1, 2026	$6.92
Aug 2, 2026	$6.92
Aug 3, 2026	$6.92
Aug 4, 2026	$6.92
Aug 5, 2026	$6.92
Aug 6, 2026	$6.92
Aug 7, 2026	$6.92
Aug 8, 2026	$6.92
Aug 9, 2026	$6.92
Aug 10, 2026	$6.92
Aug 11, 2026	$6.92
Aug 12, 2026	$6.92
Aug 13, 2026	$6.92
Aug 14, 2026	$6.92
Aug 15, 2026	$6.92
Aug 16, 2026	$6.92
Aug 17, 2026	$6.92
Aug 18, 2026	$6.92
Aug 19, 2026	$6.92
Aug 20, 2026	$6.92
Aug 21, 2026	$6.92
Aug 22, 2026	$6.92
Aug 23, 2026	$6.92
Aug 24, 2026	$6.92
Aug 25, 2026	$6.92
Aug 26, 2026	$6.92
Aug 27, 2026	$6.92
Aug 28, 2026	$6.92
Aug 29, 2026	$6.92
Aug 30, 2026	$6.92
Aug 31, 2026	$6.92
Sep 1, 2026	$6.92
Sep 2, 2026	$6.92
Sep 3, 2026	$6.92
Sep 4, 2026	$6.92
Sep 5, 2026	$6.92
Sep 6, 2026	$6.92
Sep 7, 2026	$6.92
Sep 8, 2026	$6.92
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.