Sometimes, on a dark night, your shadow thrown by a streetlight will suddenly and startlingly overtake you. It is actually a Gengar running past you, pretending to be your shadow. Hiding in people’s shadows at night, it absorbs their heat. The chill it causes makes the victims shake. It hides in shadows. It is said that if Gengar is hiding, it cools the area by nearly 10 degrees Fahrenheit.
Pokédex entry #94
gengar is a type ghost and poison Pokémon that evolves from gastly and haunter.
gengar in Pokémon GO
It's possible to hatch gengar from an egg?
No, gengar can't be hatched.
Which are gengar’s strengths and weaknesses?
gengar is a ghost and poison type Pokémon. ghost type pokémons but weak against psychic pokémons. poison type pokémons are strong against grass, bug, fairy pokémons but weak against poison, ground, rock, ghost pokémons. They are not affected by steel type pokémons.