AttackSpider Web
Flip a coin. If heads, the Defending Pokémon can't retreat. (Benching or evolving that Pokémon ends this effect.)

Ariados is Pokédex #168, generation 2 (Johto). Ariados is a Stage 1 Grass Pokémon with 60 HP. The card lists level 29. The card says it evolves from Spinarak. In this catalog that name is Spinarak (#167).
Ariados sits at 27/111 in Neo Genesis, position 27 of 111. Before it is 26 Aipom, and after it is 28 Bayleef. The set belongs to the Neo series. It was released on December 16, 2000. The printed size is 111, and the checklist is the same length. The listed rarity is Uncommon.
The attack Spider Web lists no damage number. The cost is Grass. Flip a coin. If heads, the Defending Pokémon can't retreat. (Benching or evolving that Pokémon ends this effect.) Poison Bite is another attack lists 20 damage. The cost is Grass, Grass, Grass. If this attack damages the Defending Pokémon, the Defending Pokémon is now Poisoned and you remove a number of damage counters from Ariados equal to half that damage (rounded up to the nearest 10). If Ariados has fewer damage counters than that, remove all of them. Weakness is Fire ×2. Retreat cost is 1. The flavor text reads "It spins string not only from its rear but also from its mouth. It's hard to tell which end is which."
Ariados (#168) has 17 other cards in the catalog. Those other cards are in 16 sets. The other printings with a release date run from 2002 to 2026. The earliest other card is Dark Ariados 17/105 in Neo Destiny (2002). That card is named Dark Ariados, while this one is Ariados. Both list 60 HP. The rarity there is Rare, and here it is Uncommon. Toshinao Aoki illustrated that card, and Ken Sugimori illustrated this one. Retreat cost there is 2, and here it is 1. 16 other cards of Ariados list a different HP.
The illustrator line reads Ken Sugimori. I count 1,112 other cards in the catalog with that illustrator.
Neo Genesis set binder is where a full Neo Genesis set goes. This card fills one slot there. A generation binder holds one card of each species. Ariados can fill a slot in Generation 2 binder (Johto). I still need this card.
Flip a coin. If heads, the Defending Pokémon can't retreat. (Benching or evolving that Pokémon ends this effect.)
If this attack damages the Defending Pokémon, the Defending Pokémon is now Poisoned and you remove a number of damage counters from Ariados equal to half that damage (rounded up to the nearest 10). If Ariados has fewer damage counters than that, remove all of them.
It spins string not only from its rear but also from its mouth. It's hard to tell which end is which.
Neo Genesis, in the Neo series. It was released on December 16, 2000. The printed size is 111.
27/111. It is entry 27 of 111 in this checklist.
Ken Sugimori. The catalog lists 1,112 other cards with that illustrator.
Uncommon.
Ariados #168, generation 2 (Johto).
Spider Web and Poison Bite (20).