From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Stunner_Shot&oldid=2185523"
The Stunner Shot is an Offensive Power Shot in Mario Tennis: Power Tour. In the story mode, Dweezil uses this Power Shot. It may be unlocked for the usage of Clay and Ace in the games story mode by gaining L3 Body, thus only being available through use of the Tacklebot, the only source of PS Body.
Upon activation, the user will hit a powerful move cloaked in a giant hand, much like the Psychic Save. The receiver, if returning the shot, will be pushed back drastically and be stunned, which causes them to freeze for a split second occasionally. This move is similar to the Thunder Cast Shot.
"A shot that stuns foes with a ball masked as a giant fist."