"Pokémon Yellow" holds many secrets, including special Pokémon, hidden techniques and secret items. Unlike in "Pokémon Red" or "Pokémon Blue," it is possible to acquire all three starter Pokémon. To get Squirtle, players must first beat Lt. Surge. Then, they must find Officer Jenny in the middle of the city; she offers up the powerful water Pokémon.
Charmander can be found by going to Cerulean City and defeating the five trainers on the bridge going north. After beating the trainers, players can head to the first square walkway and speak to the man there; he gives up a Charmander. Bulbasaur is also found in Cerulean City. Players can go to the house next to the Pokémon Center to meet Melanie, who cares for injured Pokémon. If Pikachu is happy, Melanie offers her Bulbasaur to the player. If Pikachu isn't happy, players can give Pikachu five potions in a row and then talk to Melanie again.
To find the legendary Zapdos, players should use the Surf technique to go into the water near the Rock Tunnel. They must follow the stream to the Power Plant to locate Zapdos near the exit. To find the hidden Mimic technique, a player must first buy a Pokédoll at Celadon Mart. Then, he must go to Saffron City and talk to the Copycat, who shares the rare technique. In Celadon City, players can check out the Game Corner to find some secret coins. They can around and press "A" repeatedly to find these coins on the floor.