In the European and Australian versions of the game, Jirachi can be downloaded into the Generation III Pokémon games after watching all the episodes of "Pichu Bros. in Party Panic.".

There is an unused song that may have been early title screen music. Also, all of the songs from Hey You, Pikachu! are present.

The trophy representing Meowth in Super Smash Bros. Melee is a reference to his appearance in a tech demo shown off at Spaceworld 2000 called "Meowth's Party", which itself was based on a recurring ending musical number from the Pokémon anime. In his trophy he is holding the same red guitar that he performs with in the tech demo. The flavor text for his trophy even directly mentions this tech demo:


A version of Meowth's Party eventually made its way into the GameCube release of Pokémon Channel.