Balotelli has been outstanding in training this week.
"We need Balotelli to work for the team, and to show responsibility," Motta said as Cesare Prandelli's squad continued preparations in Krakow for their opening match of the tournament against defending champions Spain on Sunday.
"Only like that can he make the difference, and I'm sure he will. He must help us, especially on the pitch because, off it, he can be the same as always.
"Balotelli makes me just as angry now with his jokes as he did when he was at Inter. But away from the pitch he is a good lad."