Brock's Diglett is a Normal rarity card from the Gym Challenge set in the Pokémon trading card game, designated as card #50. This Japanese variant showcases the connection between Brock and his Rock-type Pokémon, appealing to collectors for its thematic relevance. Currently valued at $8.50, it reflects the ongoing interest in Gym Leader cards and is a notable addition for those focusing on completing their collections from this era.