Have the Mighty Flip Champs DSiWare game downloaded. Go to the Import Room and talk to the woman.
Ending pictures
Complete the indicated task to unlock the corresponding picture during the ending sequence.
Risky Boots on her pirate ship: Complete the game in more than two hours with all 34 items.
Rottytops: Complete the game in less than three hours with all 34 items.
Shantae: Complete the game in more than two hours with less than 34 items.
Shantae in a bikini: Complete the game in less than two hours with less than 34 items.