Actually, you can remove the collars, but I can't say much more than that on this network. It's too risky.

[He shakes his head and leans back in his seat. Pokémon, huh? Well, he met someone from a similar world before, and after exploring the jungle with talking animals, the Pyroar's appearance barely phases him.]

They're kind of a big deal, though. If you don't get your fluids changed every two weeks, you'll collapse on the floor, and they'll have to haul you in for a checkup whether you like it or not.