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Sets/hgss1/Professor Oak's New Theory

Professor Oak's New Theory

TrainerSupporterUncommon

Set: hgss1 · #101

Artist: Ken Sugimori

Professor Oak's New Theory

Grading ROI & Alerts

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Professor Oak's New Theory is a uncommon card from hgss1 (#101). It was illustrated by Ken Sugimori.

Recent raw sales average $1.35. Below you'll find the full sold-listing history, PSA population data, and a grading ROI breakdown showing what each PSA grade is worth versus a raw copy.

Updated 3d ago

$1.35Raw Market PriceAverage of the last 5 raw sold listings on eBay and TCGplayer

Avg Last 5 Sold

$1.79

eBay Raw

$0.90

TCGplayer Raw

Source
Variant
Grader
Grade
TitlePriceVariantGraderGradeSold
Pokemon Professor Oak's New Theory Holofoil Card 101/123 World Champion$1.00 USDRaw--6/21/2026
Professor Oak's New Theory HeartGold SoulSilver Uncommon 101/123 2010 Pokemon TC$2.99 USDRaw--6/20/2026
Professor Oak's New Theory 101/123 Uncommon World Championship Decks Pokemon LP$1.99 USDRaw--6/19/2026
PROFESSOR OAK'S NEW THEORY - 101/123 - HeartGold SoulSilver HGSS - Pokemon - PL$1.50 USDRaw--6/18/2026
Professor Oak's New Theory 101/123 | HGSS | Pokemon TCG | English | Uncommon$1.49 USDRaw--6/18/2026
Pokemon Card HeartGold & SoulSilver Professor Oak's New Theory 101/123 Uncommon$1.49 USDRaw--6/17/2026
Professor Oak's New Theory 101/123 Uncommon HeartGold & SoulSilver Pokemon MP$0.99 USDRaw--6/17/2026
Professor Oak's New Theory 101/123 Pokemon Card - HG/SS - World championship NM$2.99 USDRaw--6/15/2026
Pokemon Professor Oak’s New Theory 101/123 Heartgold & Soulsilver MP+$1.90 USDRaw--6/15/2026
Professor Oak's New Theory 101/123 Uncommon HeartGold & SoulSilver Pokemon MP$1.79 USDRaw--6/12/2026

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