Unown [I] #37 — Mysterious Treasures card

Unown [I] #37/123

Mysterious Treasures · Diamond & Pearl · Rare · 2007

Market price: $10.38 (TCGplayer, raw)

Pokémon · Basic · Type: Psychic · 50 HP

Shaped like ancient writing, it is a huge mystery whether language or UNOWN came first.

Illustrated by Daisuke Ito

Market price by printing

Printing	TCGplayer (USD)	Cardmarket (EUR)
Normal	$2.58	—
Reverse Holo	$10.38	—

Raw (ungraded) market prices, refreshed several times a day. Updated 2026-10-14.

Abilities

ITEM (Poké-Power)
Once during your turn (before your attack), if you have Unown I, Unown T, Unown E, and Unown M on your Bench, you may search your deck for a Trainer card, show it to your opponent, and put it into your hand. Shuffle your deck afterward. You can't use more than 1 ITEM Poké-Power each turn.

Attacks

Hidden Power (Colorless)
Choose an Energy card attached to the Defending Pokémon and put it face down. Treat that card as a Special Energy card that provides Colorless Energy and doesn't have any effect other than providing Energy. Put that card face up at the end of your opponent's next turn.