AttackSurprise Attack
Flip a coin. If tails, this attack does nothing.

Diglett is Pokédex #050, generation 1 (Kanto). Brock's Diglett is a Basic Fighting Pokémon with 40 HP. The card lists level 13. The card lists Dugtrio, Dugtrio (#051) under evolves to.
Brock's Diglett sits at 67/132 in Gym Challenge, position 67 of 132. Before it is 66 Blaine's Vulpix, and after it is 68 Brock's Geodude. The set belongs to the Gym series. It was released on 16 October 2000. The printed size is 132, and the checklist is the same length. The listed rarity is Common.
The attack Surprise Attack lists 20 damage. The cost is Fighting. Flip a coin. If tails, this attack does nothing. Tremor is another attack lists 40 damage. The cost is Fighting, Colorless. Does 10 damage to each of your own Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Grass ×2. Resistance is Lightning -30. Retreat cost is 1.
Diglett (#050) has 28 other cards in the catalog. Those other cards are in 27 sets. The other printings with a release date run from 1999 to 2026. The earliest other card is Diglett 47/102 in Base (1999). That card is named Diglett, while this one is Brock's Diglett. That card lists 30 HP, and this one lists 40 HP. Both list the rarity Common. Keiji Kinebuchi illustrated that card, and Ken Sugimori illustrated this one. 22 other cards of Diglett list a different HP.
The illustrator line reads Ken Sugimori. I count 1,112 other cards in the catalog with that illustrator.
Gym Challenge set binder is where a full Gym Challenge set goes. This card fills one slot there. A generation binder holds one card of each species. Diglett can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Trainer's Pokémon, Kanto Gym Leaders and their Pokémon, and Brock and his Pokémon. I still need this card.
Flip a coin. If tails, this attack does nothing.
Does 10 damage to each of your own Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Gym Challenge, in the Gym series. It was released on 16 October 2000. The printed size is 132.
67/132. It is entry 67 of 132 in this checklist.
Ken Sugimori. The catalog lists 1,112 other cards with that illustrator.
Common.
Diglett #050, generation 1 (Kanto).
Surprise Attack (20) and Tremor (40).