AbilityHard Cocoon
During your opponent's turn, if Cascoon would be damaged by an opponent's attack (after applying Weakness and Resistance), flip a coin. If heads, reduce that damage by 30.

Cascoon is Pokédex #268, generation 3 (Hoenn). Cascoon is a Stage 1 Grass Pokémon with 70 HP. The card says it evolves from Wurmple. In this catalog that name is Wurmple (#265). The card lists Dustox, Dustox (#269) under evolves to.
Cascoon sits at 26/109 in Ruby & Sapphire, position 26 of 109. Before it is 25 Aron, and after it is 27 Combusken. The set belongs to the EX series. It was released on July 1, 2003. The printed size is 109, and the checklist is the same length. The listed rarity is Uncommon.
Hard Cocoon is listed as Poké-Body. During your opponent's turn, if Cascoon would be damaged by an opponent's attack (after applying Weakness and Resistance), flip a coin. If heads, reduce that damage by 30. The attack Poison Thread lists no damage number. The cost is Grass. The Defending Pokémon is now Poisoned. Weakness is Fire ×2. Retreat cost is 2.
Cascoon (#268) has 8 other cards in the catalog. Those other cards are in 8 sets. The other printings with a release date run from 2006 to 2026. The earliest other card is Cascoon 30/92 in Legend Maker (2006). Both list 70 HP. Both list the rarity Uncommon. Sachiko Adachi illustrated that card, and Midori Harada illustrated this one. 6 other cards of Cascoon list a different HP.
The illustrator line reads Midori Harada. I count 352 other cards in the catalog with that illustrator.
Ruby & Sapphire set binder is where a full Ruby & Sapphire set goes. This card fills one slot there. A generation binder holds one card of each species. Cascoon can fill a slot in Generation 3 binder (Hoenn). I still need this card.
During your opponent's turn, if Cascoon would be damaged by an opponent's attack (after applying Weakness and Resistance), flip a coin. If heads, reduce that damage by 30.
The Defending Pokémon is now Poisoned.
Ruby & Sapphire, in the EX series. It was released on July 1, 2003. The printed size is 109.
26/109. It is entry 26 of 109 in this checklist.
Midori Harada. The catalog lists 352 other cards with that illustrator.
Uncommon.
Cascoon #268, generation 3 (Hoenn).
Poison Thread.