1In medium bowl, fold chocolate syrup into whipped topping. Set aside.
2In large microwavable bowl, microwave raspberry jam on High 30 seconds or until melted. Add strawberries, raspberries and blackberries; toss until well coated.
3To assemble, divide 2 cups of the cake cubes evenly among 8 parfait, wine or champagne glasses. Layer each with half of the chocolate whipped topping and half of the berry mixture. Repeat layers with remaining 2 cups cake cubes, chocolate whipped topping and berries. Serve or refrigerate.