Make pudding according to box directions.
Transfer pudding to piping bag.
Transfer marshmallow creme to piping bag.
Combine crushed grahams and melted butter and create a layer in the bottom of serving containers.
Pipe a layer of pudding into each container.
Pipe a layer of marshmallow into each container.
Repeat with another layer of each in the dishes.
Garnish each serving with a square of chocolate bar.