Where to get a revive in FireRed?

In Pokémon FireRed, you can obtain Revives at several locations. One of the easiest places is in the Celadon Department Store, where they are sold on the 4th floor. Additionally, you can find Revives as items on the ground in certain locations, such as on Victory Road. Remember that Revives can also be acquired as prizes in some in-game events or from NPCs.