Digimon Ghost Game was officially announced at Bandai's DigiFes 2021 event on August 1, 2021[5] with a first teaser visual for the series, by Tenya Yabuno.

[4] In the October issue of Shueisha's V Jump magazine on August 19, 2021, the presentation stated that Ghost Game is going to be the franchise's first horror-themed entry.

[7] The creation of this series required putting thought into how to reinterpret the Digimon and the background lore that Bandai has created, in the context of the horror genre.

[8] Toei Animation decided to make Digimon Ghost Game a villain of the week show as they found that children of the generation the series came out have low attention spans due to the prevalence of YouTube and TikTok.

[10] On August 7, 2021, the teaser visual was updated on the official website with the only difference being, Kiyoshirō's left hand covered with bandages.

[12] The design of the protagonist wasn't finalized at the time of submission, and then changed to an original character in a new illustration revealed by the author via Twitter on September 4, 2021.

[13] On September 10, 2021, the official website revealed the cast, the airing date, as well as the main visual featuring the characters in their school uniforms, design by Mariko Itō.

The fourth ending theme, "Monster Disco" (episodes 32–44), was written and sung by Shikao Suga and arranged by Hyadain.