So you know that some bugsnax have the Burrowing attribute and this leads me to a theory
Sherby and Scoopy burrow to attack and so do Incherrito and Inchwrap
The Rootle and it's albino variation burrow when scared
And Snaquiri burrow to fly *i guess*
And then we have Pineantula that stays on the sand forever till Crapple takes it
And you guys might be asking *Preying Picantis, what do they have to do with your theory?* well the theory isn't about all of them but about Pineantula, if you think about it they might be introverts because they will stay on the ground till Red Crapple takes them out of the sand and that's the only thing i have