If its Murkrow cronies fail to catch food for it, or if it feels they have betrayed it, it will hunt them down wherever they are and punish them. If one utters a deep cry, many Murkrow gather quickly. For this, it is called “Summoner of Night.” Becoming active at night, it is known to swarm with numerous Murkrow in tow.
Pokédex entry #430
Honchkrow in Pokémon GO
It's possible to hatch Honchkrow from an egg?
No, Honchkrow can't be hatched.
Which are Honchkrow’s strengths and weaknesses?
Honchkrow is a dark and flying type Pokémon. dark type pokémons flying type pokémons are strong against grass, fighting, bug pokémons but weak against electric, rock pokémons.