The humps on Camerupt’s back are formed by a transformation of its bones. They sometimes blast out molten magma. This Pokémon apparently erupts often when it is enraged. If angered, the humps on its back erupt in a shower of molten lava. It lives in the craters of volcanoes. The volcanoes on its back have a major eruption every 10 years--or whenever it becomes really angry.
Pokédex entry #323
Camerupt in Pokémon GO
It's possible to hatch Camerupt from an egg?
No, Camerupt can't be hatched.
Which are Camerupt’s strengths and weaknesses?
Camerupt is a fire and ground type Pokémon. fire type pokémons are strong against grass, ice, bug, steel, fairy pokémons but weak against fire, water, rock, dragon pokémons. ground type pokémons are strong against fire, electric, poison, rock, steel pokémons but weak against grass, bug pokémons. They are not affected by flying type pokémons.