A Potion is an item that heals 20 HP of a Pokémon. It has no effect on a fainted Pokémon. A potion can be found in the player's PC at the start of the game, except in Generation IV. It costs 300 Poké Dollars at Poké Marts and can be sold for 150 Poké Dollars. It belongs to the Medicine Pocket in the player's bag.
Locations in the Games
R/G/B/Y & FR/LG: Most Poké Marts; One from Poké Mart worker on Route 1 (Also 1 in PC). Viridian City, Viridian Forest ×2 (RB) / ×3 (Y), Mt. Moon ×2.