Instructions
Open the Pokémon game in your Gameboy Advance or Nintendo DS emulator of choice.
Select "Save" from the in-game Pokémon menu and select which slot you want to save your game in. Click "Yes."
Select "File" and choose "Save State," "Write State" or "Snap Shot." This will create a save state of your game. Name the save state and click "OK."
Select "File" and "Load State" or "Load Snap Shot" to open the save state of your game.