Deprit

Deprit is a Starter Pokémon and it's Pokédex # is 001.

Deprit is a Water/Ghost type Pokémon.

Deprit evolves into Ocoste starting at Level 17 and evolves later into Paukin starting at Level 38.

Description Of Folklore
Deprit, the Water Spirit Pokémon. Being the Water type starter of the Bakiel Region, is known to be found around large, abandoned lakes and watered areas. You can usually tell when this Pokémon is near, as there is almost always a dense fog that forms in its presence. Not only that, but the closer that Deprit gets to a trainer, the more clearly you can hear its cries. These cries sound almost siren-like, luring in anyone or any Pokémon in the area. No one is sure what happens to those who fall under this mysterious song, as no one has ever returned from venturing into the fog that Deprit calls home.

Shining Stars Pokédex Entry
Deprit, the Water Spirit Pokémon. This Pokémon lures in its pray with a mysterious siren-like song. No one is quite sure what it does with its pray once it has obtained it though.

Shaded Clouds Pokédex Entry
Deprit, the Water Spirit Pokémon. It's said that Deprit is the spirit of a newly-born Deerling that passed away due to drowning or some other form of water-based death.

Resistances
Deprit is resistant to Poison, Bug, Steel, Fire, Water, and Ice types.

Immunities
Deprit is immune to Normal and Fighting types.

Weaknesses
Deprit is weak against Ghost, Grass, Electric, and Dark types.

Normal Damage
Deprit can still take normal amounts of damage from Flying, Ground, Rock, Psychic, Dragon, and Fairy types.

How to Obtain a Deprit
While Deprit is a starter Pokémon, you can still come across wild Deprit at night. But, you can only encounter this Pokémon at Delian Lake. Same goes for its other evolutions (Ocoste, Paukin). The other, more obvious, way of obtaining a Deprit is by choosing it as your starter Pokémon.