Place 2-inch-thick slices of pound cake on dessert plates. Douse cake slices with sambuca or other anise liqueur.
Slice berries and sprinkle with 2 teaspoons sugar, then toss and reserve.
Beat whipping cream with 2 tablespoons sugar with a hand mixer until soft peaks form.
Top cake with berries and drizzle with zigzags of syrup. Top cake and berries with whipped cream. Using a vegetable peeler, shave dark chocolate over each dessert plate and serve.