Piranha Swingback

From the Super Mario Wiki

Piranha Swingback is the Defensive Power Shot used by Petey Piranha in Mario Power Tennis. It involves Petey Piranha spitting a large sludge-covered Piranha Plant with a tennis racket in its mouth. The Piranha Plant will then hit the ball back over the court. It is slightly less likely that this shot works.

Offensive Power Shots Mario Iron Hammer Bowser Fire Breath Luigi Squeaky Mallet Bowser Jr. Magic Paint Princess Peach Super Peach Spin Boo Boo Blast Princess Daisy Wonder Flower Fly Guy Tornado Twist Wario Thunder Cast Shot Diddy Kong Acrobatic Banana Waluigi Whirluigi Paratroopa Energy Ball Yoshi Rainbow Flutter Wiggler Anger Management DK Barrel Cannon Blast Petey Piranha Sludge Racket Shy Guy Lightning Spear Koopa Troopa Water Bomb

Defensive Power Shots Mario Spin Jump Return Bowser Spinning Shell Dash Luigi Poltergust Return Bowser Jr. Rolling Brush Return Princess Peach Sweet Kiss Return Boo Boo Brigade Return Princess Daisy Flowerbed Return Fly Guy Tornado Return Wario Ultra-Hand Return Diddy Kong Barrel Jet Waluigi Swimming Return Paratroopa Sky Dive Yoshi Rolling Egg Return Wiggler Flutter Return DK Boomerang Banana Return Petey Piranha Piranha Swingback Shy Guy Spear Dance Return Koopa Troopa Water Shell Dash