Use your imagination and pretend you have an actual toy
What's more enjoyable for little girls than playing with a fashion doll? Playing with a fake fashion doll on the DS, of course! Licca-chan DS allows kids to play with an inferior, poorly-rendered, digital version of the popular Japanese doll, for what is likely to be a greatly increased cost!
Drawing clothing designs and turning them into dresses for the doll is about the only benefit to this thing. You can make a fake cake with the fake doll, but is it really going to be any better than Cooking Mama? Or just a regular cake? There's no other reason to choose this over a normal plastic doll. Well, actually, we don't know anything about fashion dolls, but we can't imagine purchasing a DS version of, say, a Spider-Man action figure.
Oh, we just realized who the audience was for this thing-- people who want to play with dolls, but don't want to be seen playing with dolls. In other words, girls who are slightly too old for Licca-chan.
