If Blisdile wants something that another person or Pokémon has, it will try offering its egg in exchange. If that fails, Blisdile will fall back on intimidation, using its sharp teeth as a threat, although it rarely needs to actually attack.
It can expand the focus of its eyes, enabling it to see objects in the far distance as if it were using binoculars. If it senses sadness with its fluffy fur, a Blisdile will rush over to the sad person, however far away, to share an egg of happiness that brings a smile to any face.