Marill is card #74 of 123 in HeartGold & SoulSilver (2010), a Common illustrated by Kouki Saitou. At about $9.29 it is the #85 most valuable card in the set. In a HeartGold & SoulSilver booster it turns up about once every 7 packs. It is one of 26 Marill cards printed so far.
1999Wizards Black Star Promos
2001Southern Islands
2004Team Rocket Returns
2007Diamond & Pearl
2010HeartGold & SoulSilver
2015Primal Clash
2017Burning Shadows
2023Paldea Evolved

















See the full HeartGold & SoulSilver card list
An ungraded Marill from HeartGold & SoulSilver sells for about $9.29. A PSA 10 is worth more, roughly $74.32 by our estimate, and a PSA 9 around $26.01.
It is a Common, and it shows up about once every 7 HeartGold & SoulSilver packs.
Kouki Saitou drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open HeartGold & SoulSilver 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.