Enter these at the title screen.
Lisa's treasures:XYXXY then the left d-pad.
Lisa's outfits:XYXXY then the left thumbstick in.
Bart's outfits:D-pad right D-pad left XXY Right thumbstick in.
Marge's outfits:YXYYX Right thumbstick in.
Homer's outfits:D-pad left D-pad right YYX left thumbstick in.
Added by: darkblade64 Jul 5th 2008, ID#2741