A Park Ball is a type of Poké Ball. It is only used in the Pal Park. It is only used in Generation 4 since that is the only generation which transfer Pokémon between generations via the Pal Park. The Pokémon caught in these balls will change the ball type to tthat of which it was originally caught in in Generation 3. They cannot be found anywhere in the main game without hacking. It has a catch rate of 255 and never fails.