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Professor Cozmo's Discovery
Holon Phantoms · #89/110
Professor Cozmo's Discovery (89/110), the Uncommon from Holon Phantoms, has an estimated ungraded market price of about $0.50.
As of September 14, 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 Cozmo's Discovery
Professor Cozmo's Discovery is a Uncommon (89/110) from the Pokémon Holon Phantoms set, released May 3, 2006. 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 Cozmo's Discovery
Professor Cozmo's Discovery appears on 2 different cards across the sets Riffle tracks, at very different values. This page covers #89/110 from Holon Phantoms; the collector number printed at the bottom of the card tells them apart.
FAQ
How much is Professor Cozmo's Discovery (89/110) worth?
Professor Cozmo's Discovery (89/110), the Uncommon from Holon Phantoms, has an estimated ungraded market price of about $0.50. Note: 1 other card named Professor Cozmo's Discovery exists across the sets Riffle tracks, at very different values; check the collector number.
Which Professor Cozmo's Discovery card is this, and how do I tell the versions apart?
This page covers Professor Cozmo's Discovery (89/110), the Uncommon (about under $1) from Holon Phantoms.
The other version: #90/107 from Deoxys (Uncommon, about under $1).
The collector number printed at the bottom of the card is the reliable way to tell them apart.
Is Professor Cozmo's Discovery (89/110) rare?
Professor Cozmo's Discovery (89/110) is a Uncommon. PSA has graded 22 copies to date, so graded supply is measurable and growing.
More from Holon Phantoms
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 ±20% around its midpoint: a moderate spread.
- Sampled daily since July 20, 2026, current as of September 14, 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 →