The P-Wing (originally Magic Wing) is a special item that debuted in Super Mario Bros. 3. The "P" stands for Paratroopa or Patapata (the Japanese name for that enemy). It is a successor to the power-up simply known as the Wing.
The P-Wing debuts in Dry Bones Kart Arcade GP DX. This item grows a pair of wings on the kart, allowing it to fly above all other racers, replacing the Bullet Bill.
THe P-Wing will be a brand new item in Dry Bones Kart 9. This item will grow wings onto the kart, allowing it to fly very fast above the course, just like the Blue Spiny Shell (from Dry Bones Kart: Double Dash!! onwards), Spiny Shell (from arcade games), and the Spiny Bombshell (from Dry Bones Kart 7 onwards).