Voltorb is extremely sensitive—it explodes at the slightest of shocks. It is rumored that it was first created when a Poké Ball was exposed to a powerful pulse of energy. Usually found in power plants. Easily mistaken for a Poké Ball, it has zapped many people. It was discovered when Poké Balls were introduced. It is said that there is some connection.
Pokédex entry #100
voltorb in Pokémon GO
It's possible to hatch voltorb from an egg?
Yes, voltorb it's a Pokémon that can be hatched from an egg. voltorb can be hatched from a 5km egg.
How many CP would voltorb have after evolving?
If you’ve catched a voltorb and you want to know how many points it would have after evolving, use this evolution calculator and find out easily. You just need to write your Bulbasaur CP and then click “Evolve”.
Which are voltorb’s strengths and weaknesses?
voltorb is a electric type Pokémon. electric type pokémons are strong against water, flying pokémons but weak against electric, grass, dragon pokémons. They are not affected by ground type pokémons.