The Pokémon the Movie Coco Special Advance Ticket pre-order release date, which was scheduled for April 17th, 2020, was postponed due to COVID-19. On June 15th, 2020, the official movie website updated and announced that the Special Advance Tickets could be purchased starting on August 7th, 2020.

Satoshi's Hat - The Isle of Armor

Those that purchase the Pocket Monsters Sword and Shield expansion The Isle of Armor, which will be released on June 17th, 2020, can receive Satoshi's Hat as an in-game item to wear. Players will need to take Zarude with them and talk to the woman right at The Isle of Armor. Zarude can be obtained by purchasing a Special Advance Ticket with Serial Codes.


Source: https://www.pokemon-movie.jp/tickets/benefits.php and https://www.pokemon-movie.jp/tickets/

Pikachu's Expedition Pattern

It was announced on July 31st, 2020 that special advance tickets for the movie would be available in a Pikachu's Expedition Pattern (探検ピカチュウ柄) and that they'll go on sale at Pokémon Centers, Pokémon Stores and the Pokémon Centers Online nationwide in Japan starting on Friday, August 7th, 2020.

Source: https://www.pokemon.co.jp/info/2020/07/200731_a01.html