Culumungous

Culumungous is a Flying-type Pokémon introduced in Generation Neo-I.

It evolves from Cutemulus starting at level 36 when leveled up in a high altitude (TBA) during extreme weather (Rain, Thunderstorm, Hail).

Biology
Culumungous is a massive body consisting of writhing black storm clouds that represent a storm rider. It sits atop a greyish white cloud. It has angry dark eyes, and wields a thunderbolt.

Triva
Culumungous may be based off of a cumulus cloud.

Culumungous may be a combination of cumulus and humongous.