Image © The Pokémon Company, shown for identification.
Professor Elm's Training Method
HeartGold SoulSilver · #100/123
Professor Elm's Training Method (100/123), the Uncommon from HeartGold SoulSilver, has an estimated ungraded market price of about $0.30.
As of September 12, 2026 · tracked daily by Riffle · estimates, not financial advice · how these numbers work
The modeled fair value of this card, with a confidence grade: what it should trade at, not just what it lists at. Part of Riffle premium, alongside price history and the full graded ladder.
About Professor Elm's Training Method
Professor Elm's Training Method is a Uncommon (100/123) from the Pokémon HeartGold SoulSilver set, released February 10, 2010. Ungraded copies currently trade at an estimated market price of under $1. The artwork is by Ken Sugimori. Riffle tracks its market price daily; graded (PSA) comps and full price history are available with Riffle.
Other versions of Professor Elm's Training Method
Professor Elm's Training Method appears on 5 different cards across the sets Riffle tracks, at very different values. This page covers #100/123 from HeartGold SoulSilver; the collector number printed at the bottom of the card tells them apart.
FAQ
How much is Professor Elm's Training Method (100/123) worth?
Professor Elm's Training Method (100/123), the Uncommon from HeartGold SoulSilver, has an estimated ungraded market price of about $0.30. Note: 4 other cards named Professor Elm's Training Method exist across the sets Riffle tracks, at very different values; check the collector number.
Which Professor Elm's Training Method card is this, and how do I tell the versions apart?
This page covers Professor Elm's Training Method (100/123), the Uncommon (about under $1) from HeartGold SoulSilver.
The other versions: #148/165 from Expedition Base Set (Uncommon, about $2–$3); #89/115 from Unseen Forces (Uncommon, about $0.70–$1); #79/101 from Dragon Frontiers (Uncommon, about under $1); #82/95 from Call of Legends (Uncommon, about under $1).
The collector number printed at the bottom of the card is the reliable way to tell them apart.
Is Professor Elm's Training Method (100/123) rare?
Professor Elm's Training Method (100/123) is a Uncommon. PSA has graded 7 copies to date, so graded supply is measurable and growing.
More from HeartGold SoulSilver
PSA population & gem rate
From the PSA population census, captured monthly by Riffle. Grade-by-grade population and pop-over-time appear with Riffle premium.
- under $1 is the middle 80% of clean market activity, not the cheapest listing and not the most hopeful one.
- The band spans about ±33% around its midpoint: a wide spread, so read it as a range, not a point.
- Sampled daily since August 25, 2026, current as of September 12, 2026.
When the data thins, the band widens and says so, it never fakes precision. Exact source prices are part of Riffle premium; the band is Riffle’s own figure to publish. How these numbers work →