The standard Poké Ball is the up-and-coming Pokémon Trainer's bread and butter for catching and cataloging Pokémon. It's cheap, common, and for the most part effective.
While the Poké Ball is sufficient for catching most Pokémon(especially after applying status effects), a Pokémon Trainer will find it to be woefully lacking when faced with rarer Pokémon species, especially in the Legendary and Mythical groups, or even something seemingly unremarkable, like Murkrow. As such, the player may want to consider other Poké Ball options to maximize their catch chances and reduce their expenses.
Poké Balls can be purchased for $200 at any Poké Mart, as well as the Poké Ball Emporium located in the shopping district of Anthian City.