Mareep is card #67 of 109 in Team Rocket Returns (2004), a Common illustrated by Naoyo Kimura. At about $54.99 it is the #80 most valuable card in the set. In a Team Rocket Returns booster it turns up about once every 6 packs. It is one of 28 Mareep cards printed so far.
2000Neo Genesis
2003Aquapolis
2004Team Rocket Returns
2006Dragon Frontiers
2009Platinum
2011Call of Legends
2018Lost Thunder
2021Chilling Reign

















See the full Team Rocket Returns card list
An ungraded Mareep from Team Rocket Returns sells for about $54.99. A PSA 10 is worth more, roughly $715 by our estimate, and a PSA 9 around $220.
It is a Common, and it shows up about once every 6 Team Rocket Returns packs.
Naoyo Kimura drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Team Rocket Returns 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.