The rock which binds Wiglett into Wugtrio is a puzzling phenomenon, for it has no obvious antecedent within Wiglett itself, nor does it resemble part of any known pokemon which Wugtrio might conceivably scavenge or parasitize. What's more, there is some evidence that one of these rocks may occasionally be too small for three to fit comfortably for prolonged periods of time, although there are no known reports of any so big as to permit a fourth pokemon to join them. The best available theory links it to the undersea tectonic process which produces Wiglett in the first place, and likens the rock to the shells of fossil pokemon – yet it is non-protective and serves no role in battle, for Wugtrio does not even learn Withdraw.

Wugtrio heads have a habit of slithering out of the rock which all three call home, and how to refer to them in this situation is one of the biggest conundrums in pokemon grammar – a conundrum their silence gives the audience no aid in answering. Can a pokemon of such great size properly still be called a Wiglett, or is the singular now a 'wug'? In standards and dialects which pluralize pokemon species, should multiple be called Wugtrios, or is Wugtrio, as a composite pokemon, already plural? Famous surveys among tourists on the Paldean coast about Wugtrio led to no clear answers; even questions common to all pokemon, such as whether to capitalize species names or just individuals, remained in dispute.

It is for good reason that the logo of the International Linguistics Association is a Wugtrio (or should I say three Wugtrio?), with one of the heads (or Wugs or Wiglett) posed in front of their shell, and the other two still inside.