Gym Heroes is a set in the Gym series. It was released on 14 August 2000. The printed size is 132, and the checklist is the same length. Good Manners is 111/132, in position 111 of 132 on this checklist. Before it is 110 Erika's Perfume, and after it is 112 Lt. Surge's Treaty. The listed rarity is Uncommon.
Good Manners is a Trainer card.
Ken Sugimori illustrated this card. The same name is on 1,112 other cards in the catalog.
The card text says: In order to play this card, you can't have any Basic Pokémon cards in your hand. Show your hand to your opponent, then search your deck for a Basic Pokémon card, show it to your opponent, and put it into your hand. Shuffle your deck afterward.
I keep a set binder for Gym Heroes, meant to hold every card of that set. This card is one slot in the Gym Heroes set binder. I still need this card.