From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Barrel_Swing&oldid=2404962"
Barrel Swing is Donkey Kong's Star Swing in Mario Super Sluggers. When used, Donkey Kong will pound his chest a few times, and a barrel will drop down from the sky. Donkey Kong will hit the barrel, and it will roll across the field. If no fielder catches it, it will keep rolling. If a fielder tries to catch it, the barrel will disappear, but the fielder will be stunned for a while after catching the ball.
There is a small chance that this swing will backfire, such as a foul, but when using the swing, it is most likely to make a Home-Run.