Graffiti Swing is Bowser Jr.'s Star Swing in Mario Super Sluggers. It replaces his Killer Jr. Ball move from Mario Superstar Baseball, which itself is also replaced by the Graffiti Ball for when Bowser Jr. is pitching.
Description[]
When Bowser Jr. initiates Graffiti Swing, he twirls his Magic Paintbrush in his fingers and streaks paint all around him to create the effect. A fake ball lands first, splattering the landing spot with paint and temporarily stunning any fielders who try to catch it. A few seconds later, the actual ball then lands. Characters who can move around in midair, such as Paragoomba, are unaffected by Graffiti Swing.