FusionDex

Caterpie have far more elaborate head crests than unfused Caterpie. Pokémon researchers have found these crests to be covered with acute sensory hairs that Caterpie use to detect the pheromones of other Caterpie.

Its voracious appetite compels it to devour leaves bigger than itself without hesitation. Its voracious appetite compels it to devour leaves bigger than itself without hesitation.