Round UFO Attack is Tarble's Ultimate in Dragon Ball: Raging Blast 2.
The attack starts with Tarble charging at his opponent and kneeing them in the face, which knocks them down. He then takes out his remote and proceeds to press some buttons on it, which summons his Attack Ball. As the Attack Ball comes charging towards the opponent, Tarble points towards them and yells "Goooooo!". Just as he yells that, the Attack Ball forcefully crashes into the opponent, inflicting a great deal of damage.
In the OVA Dragon Ball: Yo! Son Goku and His Friends Return!!, Tarble accompanied by Gure destroys some building in West City on board of their Attack Balls at high speed in a similar manner to the Round UFO Attack during their arrival on Earth.