Dratini continually molts and sloughs off its old skin. It does so because the life energy within its body steadily builds to reach uncontrollable levels. This Pokémon is full of life energy. It continually sheds its skin and grows steadily larger. It is called the “Mirage Pokémon” because so few have seen it. Its shed skin has been found.
Pokédex entry #147
dratini is a type dragon Pokémon that evolves first into dragonair and then into dragonite.
dratini in Pokémon GO
It's possible to hatch dratini from an egg?
No, dratini can't be hatched.
How many CP would dratini have after evolving?
If you’ve catched a dratini 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”.