FusionDex

The massive egg Blisnix drags around with it has a thick shell as hard as rock. While Blisnix will offer to share it with people and Pokémon it encounters, few have the strength to crack it, which seems to disappoint Blisnix.

There is a magnet in its brain that prevents an Blisnix from losing direction while tunneling. If it senses sadness with its fluffy fur, a Blisnix will rush over to the sad person, however far away, to share an egg of happiness that brings a smile to any face.