Darkrai

Darkrai is a -typePokémon introduced in Generation IV. Along with Cresselia, it is a member of the Lunar duo and is also known as the 'Pitch-Black Pokémon'

How to Obtain
Darkrai can be found anywhere at night. It can also be obtained by trade or by the Pokemon Roulette (Normal and Upgraded Versions).

Evolution
Darkrai doesn't evolve.