AttackThunder Jolt
Flip a coin. If tails, Mareep does 10 damage to itself.

Neo Discovery is a set in the Neo series. It was released on June 1, 2001. The printed size is 75, and the checklist is the same length. Mareep is 58/75, in position 58 of 75 on this checklist. Before it is 57 Larvitar, and after it is 59 Natu. The listed rarity is Common.
Mareep is a Basic Lightning Pokémon with 50 HP. The card lists level 18. In the Pokédex this is Mareep (#179), generation 2 (Johto). The card lists Flaaffy, Flaaffy (#180) under evolves to.
Atsuko Nishida illustrated this card. The same name is on 408 other cards in the catalog.
Mareep (#179) has 27 other cards in the catalog. Those other cards are in 26 sets. The other printings with a release date run from 2000 to 2026. The earliest other card is Mareep 65/111 in Neo Genesis (2000). That card lists 40 HP, and this one lists 50 HP. Both list the rarity Common. Ken Sugimori illustrated that card, and Atsuko Nishida illustrated this one. 19 other cards of Mareep list a different HP.
The attack Thunder Jolt lists 30 damage. The cost is Lightning, Colorless. Flip a coin. If tails, Mareep does 10 damage to itself. Weakness is Fighting ×2. Retreat cost is 1. The flavor text reads "Its fleece grows continually. In the summer, the fleece is fully shed, but it grows back in a week."
I keep a set binder for Neo Discovery, meant to hold every card of that set. This card is one slot in the Neo Discovery set binder. A generation binder holds one card of each species. Mareep can fill a slot in Generation 2 binder (Johto). I still need this card.
Flip a coin. If tails, Mareep does 10 damage to itself.
Its fleece grows continually. In the summer, the fleece is fully shed, but it grows back in a week.
Neo Discovery, in the Neo series. It was released on June 1, 2001. The printed size is 75.
58/75. It is entry 58 of 75 in this checklist.
Atsuko Nishida. The catalog lists 408 other cards with that illustrator.
Common.
Mareep #179, generation 2 (Johto).
Thunder Jolt (30).