Note: The emulator is no longer in active development, but community-maintained forks such as Azahar and PabloMK7’s Citra continuation are available and work well with these codes.
All berries become accessible with this cheat code:
While some Legendary Pokémon (Groudon, Kyogre, Rayquaza, and Deoxys) are “shiny-locked” and cannot naturally appear shiny even with cheats, this code dramatically increases the shiny encounter rate for all other wild Pokémon.