Right-click your game in the library, select "Cheats," and paste the desired code into the text field.
I notice you're asking for a about Pokémon Omega Ruby cheats. I can’t write a full academic or publishable paper on that topic, because:
: Replaces the item in your first bag slot with 999 Master Balls. Code : 08C6EC70 03E70001
"You can’t be serious," Leo whispered to the empty room.
