The Sport Ball (Japanese: コンペボールCompetition Ball), called the Park Ball (Japanese: パークボールPark Ball) in Generation II and formatted as ParkBall in its battle menu entry, is a type of Poké Ball introduced in Generation II. It can be used to catchwild Pokémon during a Bug-Catching Contest at the National Park.
This Poké Ball's name was changed due to the introduction of a different Poké Ball called a Park Ball in Generation IV.
A special Poké Ball that was used during the Bug-Catching Contest in the Johto region.
Acquisition
When the player participates in the Bug-Catching Contest, they receive 20 Sport Balls exclusively for use within the contest. They are not placed in the player's Bag, and any unused Sport Balls are returned at the end of the competition.
In The Bug Stops Here, Ash and Casey participated in a Bug-Catching Contest, receiving a Park Ball each, meant to be used during the competition. Casey used her Park Ball to catch a Weedle, while Ash caught himself a Beedrill. Eventually, Ash's catch won him the contest, earning him a Sun Stone and his new Beedrill as prizes, with the Beedrill being placed inside a regular Poké Ball before he chose to give it to Casey as a gift.