Xatu is known to stand motionless while staring at the sun all day long. Some people revere it as a mystical Pokémon out of their belief that Xatu is in possession of the power to see into the future. They say that it stays still and quiet because it is seeing both the past and future at the same time. Once it begins to meditate at sunrise, the entire day will pass before it will move again.
Pokédex entry #178
Xatu in Pokémon GO
It's possible to hatch Xatu from an egg?
No, Xatu can't be hatched.
Which are Xatu’s strengths and weaknesses?
Xatu is a flying and psychic type Pokémon. flying type pokémons are strong against grass, fighting, bug pokémons but weak against electric, rock pokémons. psychic type pokémons are strong against fighting, poison, ghost pokémons but weak against bug, shadow pokémons.