At the final wall, wall bounce over it and you will find the two cute characters behind bars. (gamerankings.com)
Quickly wall bounce up (it has a short timer) and activate the Rocky Mountain Summit. (eurogamer.net)
Tapping the right shoulder button during certain special moves triggers the EX version of the attack.In an effort to help players of all levels understand the game's base juggling system, Injustice throws in the universal feature of ground bouncing overheads and forced wall bounce attacks for extending juggles; the latter of which opens up another layer to damage dealing: Stage Transitions. (gamingunion.net)