After the player defeats and catches Dialga/Palkia at the Temple of Sinnoh, Palkia/Dialga emerges from a portal, forcing Galaxy Team to retreat. To catch Palkia/Dialga as well, Professor Laventon crafts the Origin Ball from the Red Chain's fragments and a sample of the Origin Ore, an ore of mysterious power, said to contain the power of almighty Sinnoh itself. That Poké Ball would be strong enough to catch the frenzied Origin Forme Palkia/Dialga.
The Origin Ball is the only usable Poké Ball that is also a Key Item, and the only kind of Poké Ball obtainable in a core series game that cannot be thrown during normal gameplay.
The Origin Ball can only legitimately contain two species of Pokémon, the fewest of any Poké Ball in the core series games.
Due to this, Dialga and Palkia are the only two Pokémon that can be legitimately caught in every kind of Poké Ball in the core series (besides the Park Ball, which cannot be the registered Poké Ball of any Pokémon).
The Origin Ball is the only type of Poké Ball that Pokémon can be caught in which does not have a corresponding challenge in Pokémon HOME requiring Pokémon caught in it to be deposited.
