On August 25, 2018, the film officially exposed the title LOGO, with neon flashing with a sense of cuteness; on November 13, the film released the world's first trailer and poster.
On January 21, 2019, the film was released with a 30-second Chinese character trailer; on February 14, the film was released with a Valentine’s Day poster; on February 16, the film released a 30-second TV trailer with the title "Milk Attack"; 2 On 27th, the second official trailer of the film was exposed, and a new poster was exposed; on April 11, the highlights of the Pokémon "audit" were exposed; on April 21, the high-definition stills and behind-the-scenes work photos were exposed; April 27 , The new lens of "Wonderful Lyme City" was first exposed; on April 30, the film released the trailer and poster of the "Meng" version; on May 6, the film released 10 character posters.
