Is there a way to unlock human Fiona in shrek superslam ds melee apart from playing story mode as ogre Fiona?

In "Shrek Superslam" for the DS, the primary method to unlock Human Fiona is indeed by playing through the story mode as Ogre Fiona. However, there are no known alternative methods, such as cheats or specific conditions outside of the story mode, to unlock her. Therefore, completing the story mode with Ogre Fiona is the main route to access Human Fiona.