Base is a set in the Base series. It was released on 9 January 1999. The printed size is 102, and the checklist is the same length. Devolution Spray is 72/102, in position 72 of 102 on this checklist. Before it is 71 Computer Search, and after it is 73 Impostor Professor Oak. The listed rarity is Rare.
Devolution Spray is a Trainer card.
Keiji Kinebuchi illustrated this card. The same name is on 212 other cards in the catalog.
The card text says: Choose 1 of your own Pokémon in play and a Stage of Evolution. Discard all Evolution cards of that Stage or higher attached to that Pokémon. That Pokémon is no longer Asleep, Confused, Paralyzed, Poisoned, or anything else that might be the result of an attack (just as if you had evolved it).
I keep a set binder for Base, meant to hold every card of that set. This card is one slot in the Base set binder. I still need this card.
Choose 1 of your own Pokémon in play and a Stage of Evolution. Discard all Evolution cards of that Stage or higher attached to that Pokémon. That Pokémon is no longer Asleep, Confused, Paralyzed, Poisoned, or anything else that might be the result of an attack (just as if you had evolved it).
Base, in the Base series. It was released on 9 January 1999. The printed size is 102.
72/102. It is entry 72 of 102 in this checklist.
Keiji Kinebuchi. The catalog lists 212 other cards with that illustrator.
Rare.