Card text
Look at 7 cards from the top of your deck. You may choose a Basic Pokémon or Evolution card from those cards, show it to your opponent, then put it into your hand. Shuffle the rest into your deck.

Gym Challenge is a set in the Gym series. It was released on October 16, 2000. The printed size is 132, and the checklist is the same length. Master Ball is 116/132, in position 116 of 132 on this checklist. Before it is 115 Koga's Ninja Trick, and after it is 117 Max Revive. The listed rarity is Uncommon.
Master Ball is a Trainer card.
Keiji Kinebuchi illustrated this card. The same name is on 212 other cards in the catalog.
The card text says: Look at 7 cards from the top of your deck. You may choose a Basic Pokémon or Evolution card from those cards, show it to your opponent, then put it into your hand. Shuffle the rest into your deck.
I keep a set binder for Gym Challenge, meant to hold every card of that set. This card is one slot in the Gym Challenge set binder. I still need this card.
Look at 7 cards from the top of your deck. You may choose a Basic Pokémon or Evolution card from those cards, show it to your opponent, then put it into your hand. Shuffle the rest into your deck.
Gym Challenge, in the Gym series. It was released on October 16, 2000. The printed size is 132.
116/132. It is entry 116 of 132 in this checklist.
Keiji Kinebuchi. The catalog lists 212 other cards with that illustrator.
Uncommon.