From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Power_Shot&oldid=2660322"
In Mario Power Tennis, there are two types of Power Shots; Offensive Power Shots and Defensive Power Shots. All players have their own distinctive power shots. The offensive power shot is used when the ball is near the player. These come with special effects to confuse the opponent(s). Defensive shots are used when the ball is out of the player's reach. These shots are very helpful by returning shots that couldn't normally be saved. In fact, Defensive Power Shots can also negate the added effects from Offensive Power Shots.
Power Shots are also a prominent feature in Mario Tennis: Power Tour, where part of the game's story revolves around the player and other characters in the game's RPG mode developing Power Shots. Power Shots can be earned by completing minigames at the Tennis Academy Training Center, and the player can then assign any offensive or defensive Power Shot available to them, to Ace or to Clay. Additionally, there is a Power Shot under the name Power Shot in the game.
Power Shots also appear in the Mario Golf series as stronger versions of regular shots. They are used up when the shot is not done perfectly. In Mario Golf: World Tour, since the number of holes to play can be adjusted, the number on the Power Shot meter is equivalent to the number of holes being played divided by three.