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Professor Oak's New Theory price and historyThe live card page: price, chart and graded ladder.All HeartGold SoulSilver pricesEvery card in the set, priced off the same tape.HeartGold SoulSilver set reportHow the whole set has moved and what leads it.Cards illustrated by Ken SugimoriEverything this illustrator has drawn, with prices.This week's biggest moversThe widest recorded moves across the catalog.All market reportsEvery card and set we publish a dossier on.How our calls scoredThe public ledger of every call, win or lose.Every Pokémon setThe full set index, oldest to newest.

Other Professor Oak's New Theory printings

Professor Oak's New Theory 83/95 · Call of Legends

What stands out

Raw price lower than 86% of HeartGold SoulSilver.

Reference class: its set (HeartGold SoulSilver). Percentiles are recomputed nightly, by disclosed rule, from recorded data across every tracked card.

01The verdict block2 readings

What the fixed formulas say about the figures below, with the arithmetic shown.

Assay

Caution1Context1

Each stamp is one fixed formula applied identically to every card. Supportive and caution mark a reading that cuts the same way for anyone holding the card. Context marks a fact that is good news to a buyer and bad news to a holder, so the desk does not pick a side.

Registry inflowContext

EFFECTIVELY CLOSED

New slabs a week against the recorded PSA population.

Character demandCaution

NICHE CHARACTER

The species demand index, a weighted percentile across every tracked species.

Every verdict is a disclosed formula over recorded data, applied with the same fixed thresholds to every card. No discretionary price forecasting is used, and the arithmetic is printed so it can be reproduced.

moonstone Pro

The full Professor Oak's New Theory dossier is sealed

Pro breaks the seal on our call: a stamped buy, hold, or sell and a 180-day target price on every rated card, each a disclosed formula over recorded data. Below is every section this dossier is holding back.

What this dossier is holding3 sealed sections

02
The call
The rating was refused on this card 2026-09-28 and the refusal states its reason; members read why in full.
03
The registry
3 daily PSA population snapshots on file, 14 days of continuous history, drawn as a growth curve.
04
The comparables
5 comparable cards across 2 reference sets, every row linked to its own dossier.

See a full report, freeMew exPaldean Fates · open to everyone, nothing sealed

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1250 report editions stamped and 2594 dated calls on the clock, each with a falsifier written at stamp time and never edited. Counted 2026-09-29. How our calls scored