

In the Americas, Europe, Australia, New Zealand, and South Korea, it was distributed via a QR Code that was given to those who attend screenings of the twentieth movie. In Japan, it was distributed via QR Code on a special Pokémon Ga-Olé disc. The Partner Cap Pikachu debuted in Pokémon Ultra Sun and Ultra Moon. The first time the player uses one of these serial codes, they also received a complimentary Pikashunium Z. In American, PAL, and Taiwanese region games, the Pikachu were distributed through a single-use public serial code released via the Pokémon website and in a similar vein to the Japanese event-the Pikachu received depended on the date the player redeems the code. The codes only worked on Japanese region games. The Pikachu received depended on the date the player redeemed the code. In Japan, the Pikachu were distributed via single-use serial code to those who pre-ordered tickets to the twentieth movie, with one code per ticket. In Generation VIII, Cap Pikachu cannot be given Gigantamax Factors with Max Soup, despite Ash's Pikachu being able to Gigantamax. In Generation VII, Cap Pikachu cannot use Catastropika, even if they hold Pikanium Z and know Volt Tackle, however, they have access to the exclusive Z-Crystal, Pikashunium Z, and its Z-Move, 10,000,000 Volt Thunderbolt. Like Ash's Pikachu, these Pikachu are always male and cannot evolve.

They are, however, present in Pokémon Sword and Shield and Pokémon Scarlet and Violet. Pikachu in a cap are not present in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, Pokémon Brilliant Diamond and Shining Pearl, and Pokémon Legends: Arceus, despite Pikachu being present in these games. World Cap Pikachu was released at the tail end of a set of distributions to celebrate the anime's timeslot move to Friday nights in Japan and the release of The Crown Tundra in October 2020. A seventh Cap Pikachu, Partner Cap Pikachu, debuted in Pokémon Ultra Sun and Ultra Moon, and an eighth, World Cap Pikachu, debuted in the Version 1.2.0 update of Pokémon Sword and Shield. The first six were introduced in Pokémon Sun and Moon and were distributed to celebrate the Pokémon anime's twentieth anniversary and movie, I Choose You!. Pikachu in a cap (Japanese: キャップをかぶったピカチュウ Pikachu wearing a cap) or Cap Pikachu are collective terms referring to the eight event male Pikachu variants based on Ash's Pikachu, wearing the hats Ash has worn throughout the anime's history.

Pokémon Brilliant Diamond and Shining Pearl.
