The English Pokémon Trading Card Game Base Set contained 102 cards.
Base Set was the first English-language set of the Pokémon TCG and was released in the United States on January 9, 1999. Its cards featured Pokémon from the first generation, along with Energy and Trainer cards needed for play. The set is especially associated with its holographic versions of Charizard, Blastoise, and Venusaur.
The figure 102 can be confusing because the original games introduced 151 Pokémon species, but a card set does not need one card for every species. Base Set also included multiple card types and did not represent the entire first-generation Pokédex. Some Pokémon appeared in more than one form or rarity across the early card releases.
Base Set was printed in several versions, including First Edition, Shadowless, and Unlimited printings. Those variants change collectible details and scarcity, but they do not change the set's standard card count. Later expansions, such as Jungle and Fossil, added more species and cards.