Things You'll Need
Instructions
Connect "Pokemon Emerald" to the GameShark and plug the GameShark into the GameBoy Advance.
Input the shiny code at the GameShark code screen. The shiny code is:
A2A4317B 9817FF81
093ECE84 CE99DAF5
9045E027 05EA1143
A6A74710 82BD7E29
Load your "Pokemon Emerald" game file.
Travel to the Safari Zone on Route 121. Explore the southwest or southeast portions of the park and walk around until you encounter a Pikachu. Any Pokemon you encounter will be shiny due to the code. Use a Safari Ball to capture it.