Divide the sponge fingers between the glasses. Combine half of the raspberries with the sugar and orange juice, crush gently with a fork, spread half of the mixture on top of the sponge fingers.
Combine the yoghurt, cream and sugar, mix well, fill the glasses with alternate layers of the yoghurt mixture and remaining crushed raspberries. Top with the remainder of the raspberries.
Sprinkle the chocolate on top of the tiramisu.