Instructions
Turn on your PS3 and sign in to the PlayStation Network.
Click the "View All by Title" option in the PSN.
Scroll down the list of titles until you locate the entry for "Soul Calibur IV."
Select the entry to display a list of downloadable content.
Select the "Yoda" option and confirm your decision to purchase. You will need to add funds to your PSN account if you do not have sufficient cash to complete the purchase.
Wait for the download to finish, then insert your Soul Calibur IV game disc. Yoda will now be available for play from the "Character Select" menu.