FusionDex

The eggs that grow on Blisterra's back are too large for any individual to eat, so Blisterra shares them with entire groups. If smaller Pokémon nest on Blisterra's back, it will be careful not to give away their eggs.

Small Pokémon occasionally gather on its unmoving back to begin building their nests. If it senses sadness with its fluffy fur, a Blisterra will rush over to the sad person, however far away, to share an egg of happiness that brings a smile to any face.