The Pokémon Company has made music from the original Pokémon Diamond and Pokémon Pearl titles available for use in personal video and music creation.
Tracks and sound effects from the Nintendo DS versions of both games, both of which were recently remade for Switch, have been released through the Pokémon DP Sound Library.
In a nutshell, the library provides access to 149 tracks of music and effects from Diamond and Pearl for free, letting those who agree to the terms of use download selected sound data for use in "creative activities and performances."
To help users make sense of the Poké-themed audio cache, the library features a 'music box' that lets players search using tags including 'events,' 'battles,' 'characters,' and 'iconic locations.' Playlists have also been added to guide listeners to the compositions that best suit their current mood.
You can check out the Pokémon DP Sound Library for yourself by clicking right here. Happy listening!