Slaking is card #34 of 123 in Mysterious Treasures (2007), a Rare illustrated by Kouki Saitou. At about $1.89 it is the #108 most valuable card in the set. In a Mysterious Treasures booster it turns up about once every 32 packs. It is one of 16 Slaking cards printed so far.
2003Ruby & Sapphire
2007Power Keepers
2009Platinum
2014Furious Fists
2018Celestial Storm
2021Evolving Skies
2022Pok茅mon GO
2024Surging Sparks

















See the full Mysterious Treasures card list
An ungraded Slaking from Mysterious Treasures sells for about $1.89. A PSA 10 is worth more, roughly $15.12 by our estimate, and a PSA 9 around $5.29.
It is a Rare, and it shows up about once every 32 Mysterious Treasures packs.
Kouki Saitou drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Mysterious Treasures booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.