They love to compare their freakish strength— strength enough to send a truck flying with a single slap. Hariyama practices its straight-arm slaps in any number of locations. One hit of this Pokémon’s powerful, openhanded, straight-arm punches could snap a telephone pole in two. It loves to match power with big-bodied Pokémon. It can knock a truck flying with its arm thrusts.
Pokédex entry #297
Hariyama in Pokémon GO
It's possible to hatch Hariyama from an egg?
No, Hariyama can't be hatched.
Which are Hariyama’s strengths and weaknesses?
Hariyama is a fighting type Pokémon. fighting type pokémons are strong against normal, ice, rock, steel pokémons but weak against poison, flying, psychic, bug, fairy pokémons. They are not affected by ghost type pokémons.