Unused music
Although most soundtrack in the Pokémon games have been applied to at least one map or other in-game interfaces such as the title and the battling system various songs and sound effects exist in the Pokémon games which are never actually used at all within normal gameplay.
Several of these tracks may have been composed to compensate for music from older games which could possibly be used elsewhere. For example; remixed music of the title screen on Pokémon Ruby and Sapphire exist on Pokémon Diamond and Pearl however this is never used in normal gameplay at all. Other tracks serve a completely unknown purpose such as an unused theme from Pokémon Battle Revolution although it is notable an off-key version of routes 206, 207, 208, and 211 accounts for several hundred areas entitled Mystery Zone in Pokémon Diamond and Pearl.
Unused soundtrack in Generation II
Four unused tracks exist in non-Japanese versions of Pokémon Crystal, but only two unused tracks when considering exist all languages.
- One track exists in Crystal for completely unknown purposes occuping slot 91 (5B) it seems to be similar to the music played in the Battle tower.
- A remixed track of the same unused song mentioned above exists in Pokémon Stadium II for unknown purposes.
Japan exclusive tracks:
As a method to obtain the GS ball to capture Celebi in Pokémon Gold, Silver and Crystal the Poké-Communications Centre (PCC) was built into the final release of the Japanese versions of the games. A mobile-adapter was sold seperately which allowed the player to initialise the event by downloading it on their mobile and transferring it to their Pokémon game. However, since these features were never included in other versions of Pokémon Gold, Silver and Crystal two extra unused tracks exist in non-Japanese games.
- The music which played when the player connected the mobile adapter.
- The music played in the Poké-Communications Centre.
Unused soundtrack in Generation III=
Several unused tracks exist in Generation III which seem to be remixes of old songs from Generation II such as Team Rocket's Theme. However other tracks such as an unused track similar to Littleroot Town may have been used as test music.