To obtain Ash’s Pikachu this time around, players need to go to the Mystery Gift menu and input the code “PIKACHUM20” on a copy of Sun or Moon.
It moved to another design (Ash’s Hoenn region hat) the succeeding week.
For Example, the original hat (the one Ash wore in the Kanto and Johto regions) lasted for only a week. The Pokémon’s hat design changes every week based on the anime series’ story progression. Previously, those who viewed the film were given a special QR code to obtain Ash’s Pikachu.