Remember how I mentioned that one of the new Pokémon being introduced in the second-half of the DLC would be based off of Momotaro? Well apparently someone noticed that there's a fourth figure that pops up in the "true" tale of Ogerpon and The Loyal Three with the upper half cropped out. Skeptics assumed that it was part of the Okidogi illustration (specifically his fist) but a lot of people were quick to point out that it the illustrations of The Loyal Three don't load at the same time and same is true for the fourth illustration.

Another person did some digging through the games files and was able to find the fourth illustration and isolate it. Here's what it looks like uncropped...

People have also noticed that a plush found in Peachy's (the main shop in Mossui Town) has a similar shape to the figure here (and the toxic chains on The Loyal Three). It's also a purplish-pink color which makes it look a bit like a peach.

People have also noticed that the design is eerily similar to Cosmog and that it may have the Ability to change forms while I've noticed that it's similar to the Glimmora line (the face follows the whole "two-featureless-eyes-in-a-black-void" design the line has and a possible Poison-type if its association with The Loyal Three is any indication). I also wouldn't be surprised if it's associated with the Area Zero and Terastallization phenomena like the Glimmora line and Terapagos are.
Also, a well-known dataminer also found text entries for battles and some of them are interesting.

It's basically agreed on that "kodaikame" has something to do with Terapagos while "dokutaro" is related to the Momotaro-themed Legendary that's going to be introduced in Part 2. The real interesting bit is the the entries relating to zombies, it's mentioned in The Teal Mask that the Crystal Pool on top of Oni Mountain has the ability to let people meet those who have passed on if they gaze into its waters and then there's the whole can of worms that are the Professor AIs present in the base game.