Actually it's very interesting to see another side of the story to the Tale of Kitakami, the tale of Ogerpon, Pecharunt, and the Loyal Three.
With the way it was told in Teal Mask it's very easy to simplify it to Pecharunt and the Loyal Three being purely "evil" but now we know why Pecharunt and the Loyal Three were even there to begin with and why they wanted Ogerpon's masks.
Pecharunt and the Loyal Three's tale does very much mirror the classic tale of Momotaro, including it being taken care of by an old couple. But now this tale as it's told offers a new perspective to Pecharunt and the Loyal Three's perspective, being that Pecharunt inadvertently drew out the wishes of the old couple and as time went on they were the ones who wanted Ogerpon's masks, and Pecharunt went on an adventure with its three retainers to get them because it wanted to make them happy.
Also puts more of Pecharunt's nature into light, it is in fact very timid and more than anything wanted to be loved.
And if I'm not mistaken it seems Okidogi was its first retainer, and had been serving it ever since it had been with the old couple. Perhaps Okidogi was responsible for gathering and delivering what the old couple wanted way back then?
Pretty cool to see the other perspective and putting Pecharunt and the three's side of the story into light. Goes to show that one side's hero can be the other side's villain, and that it's not as simple as them being "evil". It seems Pecharunt itself comes off as relatively innocent at heart but ended up ruining Ogerpon's life in doing so, inciting Ogerpon's wrath.
Honestly this makes all of them (and Ogerpon)'s story even cooler, the fact that in the grand scope, there's no true "hero" or "villain" in the story when you have every perspective. It was something that became a conflict that ended poorly for both Pecharunt and Ogerpon in the end, and led to a bitter enmity between them.