Rumsshi lets out a powerful battle cry. The cry affects directly the motor nerves of anyone listening to it, leaving them unable to move for a brief period of time. The cry can even make weaker opponents faint.
During the time the paralysis or faint lasts, Rumsshi seizes the opportunity to charge and trample his opponents.
According to Whis, the cry has such an effect because of Rummshi's having the most powerful voice in all universes.
Rumsshi used the move during the Zen Exhibition Match, paralyzing the rest of the Gods of Destruction and Goku (who was watching the match) and causing some Supreme Kais to collapse. The only individuals unaffected by it were the Angels, Great Priest, and Zenos.
Appearances in Video Games
Battle Roar appears in Dragon Ball Heroes as Rumsshi's special attack under the name of God of Destruction's Cry (破壊神の一喝 Hakaishin no Ikkatsu).