Town Map
The Town Map is the first and most basic of the map devices used by players of the Pokémon games, and is the navigational item for all Generation I games, Pokémon FireRed and LeafGreen, and all Generation IV games. They can be found on Pokémon Centers next to the PC in Generations III and IV.
Kanto
In Pokémon Red and Blue, Pokémon Green and Pokémon Yellow, and their Generation III remakes Pokémon FireRed and LeafGreen, Daisy Oak will give it to the player after he or she receives his or her starter Pokémon and delivers Oak's Parcel to the Professor.
At first, the map will only display the Kanto region. During Generation III, after the player has ventured into the Sevii Islands, Celio will give them an upgraded map, featuring Knot, Boon, and Kin Islands. After defeating the Elite Four and getting the National Dex, Celio will upgrade the map to its complete extent, revealing the final four Sevii Islands. The map display can be changed among the four sections (mainland Kanto; Knot, Boon, and Kin Island; Floe and Chrono Island and Navel Rock; and Fortune, Quest, and Birth Island) at will after getting each new map.
Sinnoh
A new, separate Town Map was introduced in Sinnoh, and serves as a complimentary map application to the Pokétch. The Sinnoh Town Map offers flavor text descriptions of all visited locations in the game, and of all routes, visited or not. The Sinnoh Town Map resembles a Nintendo DS.