Erika's Clefairy is card #40 of 132 in Gym Challenge (2000), a Uncommon illustrated by Atsuko Nishida. At about $22.20 it is the #42 most valuable card in the set. In a Gym Challenge booster it turns up about once every 14 packs. It is one of 39 Clefairy cards printed so far.
1999Base Set
2000Neo Genesis
2004FireRed & LeafGreen
2007Secret Wonders
2013Plasma Storm
2016Generations
2020Rebel Clash
2023Obsidian Flames

















See the full Gym Challenge card list
An ungraded Erika's Clefairy from Gym Challenge sells for about $22.20. A PSA 10 is worth more, roughly $289 by our estimate, and a PSA 9 around $88.80.
It is a Uncommon, and it shows up about once every 14 Gym Challenge packs.
Atsuko Nishida drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Gym Challenge 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.