"Meicoomon (In-Training)"

"Meicoomon (In-Training)" is an unnamed In-Training level Digimon.

Etymologies
No name available for this Digimon.

Development
This unnamed Digimon's first appearance was in the  smartphone service Shabette Concier as part of a promotional campaign for Digimon Adventure tri.. In this campaign and service, it was referred to only as the Mysterious Digimon (Baby) (ナゾのデジモン（幼年期）)); although Meicoomon itself does not appear in the campaign at all, the URL to install "Meicoomon (Rookie)" in Shabette Concier states this Digimon is Meicoomon's In-Training form.

In this campaign, users of Shabette Concier could download a free "Mysterious " virtual assistant, which hatched and digivolved as time passed. The Digi-Egg hatched into this Digimon at some time between October 6 and November 10, 2015, and digivolved into its Rookie form between then and March 6, 2016.

It was unknown whether the two Digimon were considered official until 2023, when this Digimon appeared in Digimon Ghost Game, "The Devourer of All" [67]. It was also unnamed in this appearance as well.

Digimon Ghost Game
This Digimon is one of the many In-Training Digimon that attended 's lesson about humans.