There is an abandoned manor somewhere in Galar where Polteageist is said to host a mad tea party. Yet many of the other attendees, much like the location of the manor itself, vary from telling to telling. The exuberance of the partiers, whatever their identities, provides a ready explanation for whatever is strange about a structure built by humans at great expense, yet ultimately abandoned.
If not for the Polteageist, it would be easy to dismiss the Mad Party as a myth, an old piece of folklore used by realtors and showmen to transform a blighted property into a haunted house. Bunnelby, Dedenne, and other small mammals often live in abandoned (or poorly secured) dwellings, and need no party to invite them there, while the marks of human habitation after aristocratic abandonment, made by squatters, have far more mystique if attributed to Mr. Rime. Yet the smell of a tea kettle is not so easily ignored in a house without heat or electricity; the Polteageist are real, and surely, they do celebrate.
There is no broad agreement on what the Polteageist are celebrating, but the most common answer is death itself. As the ghosts of brutalized slaves, or nominally free people who lived little happier lives, they are often thought to have experienced death as liberation. As support for this, no human has ever attended the Mad Party and returned alive. But it is Polteageist, not Sinistea, which host these parties; most of whom, in any case, evolved from the false Sinistea. Galarian scholars today are divided on whether the Polteageist party to celebrate their own evolution, or to prove to the world they are every bit as good a poltergeist as Gengar, and worthy of their name – or for some other, far stranger purpose.