Things You'll Need
Instructions
Start the Nintendo Wii version of the game "Beyblade Metal Fusion: Battle Fortress."
Load the Nintendo DS version of the game and go to "Story Mode." Press the Wii/DS Connection button on the right side of the screen. A connecting progress bar should appear on both the DS and your television with the Nintendo Wii.
Select the parts for the Devil Serpenter's Beyblade from the list on your Nintendo DS and choose to move the parts from the Wii to the DS. This will unlock the final character in "Beyblade: Metal Fusion" on the DS, "B-Killer."