Treecko is card #20 of 214 in Lost Thunder (2018), a Common illustrated by Tomokazu Komiya. At about $8.86 it is the #60 most valuable card in the set. In a Lost Thunder booster it turns up about once every 10 packs. It is one of 23 Treecko cards printed so far.
2003Ruby & Sapphire
2004Team Rocket Returns
2006Crystal Guardians
2008Great Encounters
2009Arceus
2013Plasma Freeze
2018Lost Thunder
2021McDonald's Collection 2021

















See the full Lost Thunder card list
An ungraded Treecko from Lost Thunder sells for about $8.86. A PSA 10 is worth more, roughly $44.30 by our estimate, and a PSA 9 around $20.38.
It is a Common, and it shows up about once every 10 Lost Thunder packs.
Tomokazu Komiya drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Lost Thunder 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.