I wanna take a moment to talk about Tailmon/Gatomon subspecies.
The classic three are the vaccine type Tailmon, the virus type BlackTailmon and the data type Mikemon.
I've talked more in-depth about Mikemon's history in a post before, but let's quickly review each of these guys' debuts.
Tailmon was introduced in Digital Monster Ver. S for the Sega Saturn in late 1998 and had its V-Pet, Card Game (Hyper Coloseum) and Anime debut shortly after in 1999. BlackTailmon was first seen in Hyper Coloseum's Starter Set Ver. 4 in 2000 and in Digimon World Digital Card Arena for the Playstation just later that year. Mikemon's debut followed in 2002 through the D-Scanner Toy and first appeared in Hyper Coloseum in the same year.
Gatomon P-006 by Tonamikanji, BlackGatomon BT8-077 by Ryodan, and Mikemon BT12-036 by koki
As of BT-12, with the addition of Mikemon, each of them is also represented in the current Digimon Card Game.
While these three are already 20 years old by now, there have also been more recent additions to the family.
I believe BlackTailmon Uver. being part of the family is pretty obvious. Meicoomon might seem a bit more far-fetched, but there's been evidence to suggest they're related.
Meicoomon has been featured along with the Tailmon family twice on the Digimon Web Twitter in celebration for 猫の日 neko no hi (cat day, 2/22). It is of note here that other cat themed Digimon were not included. It is also on the BT3 card of Tailmon, along with Mikemon.
Meicoomon's type has been stated as Unknown for the most part, but as Free in the Digital Monster Ver.20th. In that V-Pet, Nyaromon and Plotmon are used as pre-evolutions for Meicoomon. Recolors of these were shown as Meicoomon's pre-evolutions in the obscure Shabette Concier App Skin: "Mytserious DigiTama". This could suggest the unnamed Baby and Child Level of Meicoomon to be subspecies of Nyaromon and Plotmon with the same name.
[Recolors of the Bandai Artwork are fan made, from Wikimon]
Meicoomon's Digitama was also included as the final Digitama to hatch in the Digimon Adventure tri. promotional nade nade game. You can see that it is nearly identical to Tailmon's. The game even uses the same pattern, just flipped, but with darker color.
It is worth mentioning that the Digitama were displayed in black and white in the nade nade game. Tailmon's Digitama is the bottom right one on this screen.
Furthermore, Meicoomon's vaccine evolution's final stage, Rasielmon, has the trait "Throne" which previously has been exclusive to Ophanimon. (More on Angel Digimon here)
All this points to Meicoomon being intended to be a part of or closely related to the Tailmon family.
Gatomon EX6-020 by poroze from EX-06 Extra Booster Infernal Ascension
