Things You'll Need
Instructions
Put your Pokemon Diamond game in the DS slot on the back of the Nintendo DS console. Put your Pokemon Ruby, Emerald or Sapphire game in the Gameboy Advanced slot on the front of the console. Turn on the Nintendo DS.
Start your Gameboy Advance Pokemon Game (Ruby, Sapphire or Emerald). Deposit your Torchic in the Gameboy game. Choose up to six Pokemon to migrate. Then, exit the game.
Go to Pokemon Diamond. In the list of options, click "Migrate" from the title screen. The game will take you to your Gameboy game PC
Inside the Pokemon center, select the Pokemon you wish to migrate. Go to the Pal Park building and talk to the catcher. Enter Pal Park to catch the Torchic. Once you catch the Torchic, you will hear a bell calling you back into the building, where you will have the Torchic in your Pokemon Diamond PC.