Pokémon All Stars 1025 - Masayoshi Oishi

This song was a special song released as part of Pokémon's 30th anniversary celebrations in Japan where the month of April was focused around music. This song's intent is to utilise all 1,025 Pokémon in a song. However, it was released in parts with the first part on April 22nd including 213 of the 1025 Pokémon. More parts released later.