Q&A for How to Get Jirachi in Pokémon

You enter the code as a cheat using an Action Replay device. This is commonly done with emulators, but you can also use it on a physical Game Boy Advance (GBA).

Action Replay is a third-party device that allows you to input codes to modify game data, such as acquiring otherwise unobtainable items or Pokémon. However, using such devices can result in "illegitimate" in-game content that may be flagged or blocked by official services, like trades or online storage systems. While some users report successful bypasses of these checks, particularly when generated content closely mimics legitimate game data, it generally carries the risk of being detected and restricted.

No, you can only transfer Jirachi to Pokémon Ruby and Sapphire. The Pokémon Colosseum Bonus Disc was released before Pokémon Emerald, so it is not compatible.

If you obtain a Jirachi from the Pokémon Colosseum Bonus Disc (US pre-order), it has the potential to be shiny. However, Pokémon Bank does not recognize this particular Jirachi as legitimate, which prevents its transfer beyond Generation V games.