137 cards in Base Set 2:
Abra Alakazam Arcanine Base Set 2 - 2-Player CD-ROM Starter Set Base Set 2 Booster Box Base Set 2 Booster Pack Base Set 2 Theme Deck - "Grass Chopper" Base Set 2 Theme Deck - "Hot Water" Base Set 2 Theme Deck - "Lightning Bug" Base Set 2 Theme Deck - "Psych Out" Beedrill Bellsprout Bill Blastoise Bulbasaur Butterfree Caterpie Chansey Charizard Charmander Charmeleon Clefable Clefairy Computer Search Cubone Defender Dewgong Diglett Dodrio Doduo Double Colorless Energy Dragonair Dratini Drowzee Dugtrio Electabuzz Electrode Energy Removal Energy Retrieval Exeggcute Exeggutor Farfetch'd Fearow Fighting Energy Fire Energy Full Heal Gastly Goldeen Grass Energy Growlithe Gust of Wind Gyarados Haunter Hitmonchan Imposter Professor Oak Item Finder Ivysaur Jigglypuff Jynx Kadabra Kakuna Kangaskhan Lass Lickitung Lightning Energy Machoke Machop Magikarp Magmar Magnemite Magneton Maintenance Marowak Meowth Metapod Mewtwo Mr. Mime Nidoking Nidoqueen Nidoran F Nidoran M Nidorina Nidorino Ninetales Onix Paras Parasect Persian Pidgeot Pidgeotto Pidgey Pikachu Pinsir PlusPower Poke Ball Pokedex Pokemon Breeder Pokemon Center Pokemon Trader Poliwag Poliwhirl Poliwrath Potion Professor Oak Psychic Energy Raichu Raticate Rattata Rhydon Rhyhorn Sandshrew Scoop Up Scyther Seaking Seel Snorlax Spearow Squirtle Starmie Staryu Super Energy Removal Super Potion Switch Tangela Tauros Venomoth Venonat Venusaur Victreebel Voltorb Vulpix Wartortle Water Energy Weedle Weepinbell Wigglytuff Zapdos