To perform a team ultimate jutsu you first must charge up your support bar which is in the top left of your screen. To fill it up you must continue using support characters, by using LB or RB, during a single battle. Once it is maxed out you can use the jutsu by pressing
then
.
To gain the achievement your team ultimate jutsu must be the finishing blow on your opponent. This is easily done in free battle with two controllers, though you may get it naturally during the adventure mode.