Diglett

Diglett is a Ground-type Pokémon marked as No. 050 in the National Pokédex. This tiny creature resides beneath the earth and makes its presence known by sticking its head out of the ground. No one has ever seen a Diglett's entire body as even when they are released from Poké Balls they appear buried.

Pokédex Data
Diglett, the Mole Pokémon, is always buried within the earth and only ever surfaces its head. Because of this, the full size and shape of Digletts is unknown. What is known is that they have very thin skin and prolonged exposure to the sun will cause them to overheat and faint.

Diglett digs regularly through the earth at a shallow depth, leaving perfectly tilled soil in its wake. Digletts live in tunnels and caves under the earth, where they feed on tree roots. They also sometimes live in burrows near forests, and have even been known to live inside of trees.

Alolan Variant
Due to the volcanic activity of the Alolan Islands, the Digletts there have developed fine golden hairs atop their heads. The rich mineral deposits found in Alolan soil has also led to the native Digletts evolving a secondary Steel-type. Alolan Digletts twitch the hairs on their heads in order to convey emotion and communicate with other creatures without having to emerge from the ground.

Abilities

 * Dig - Diglett swiftly burrows beneath the ground and will suddenly pop up to ambush its opponent.
 * Mud Slap - Diglett flings mud at its opponent, inflicting minor damage and obscuring their vision.
 * Astonish - A surprise attack that causes the enemy to flinch.
 * Sand Attack - Diglett creates an eruption of sand to blind its foe.
 * Metal Claw - The Alolan Diglett attacks with finely-sharpened, metal-edged claws. It attacks so quickly that no one has ever seen where the claws come from.

Evolution
When three mature Digletts come into close contact, they conjoin to form Dugtrio. For the sake of gameplay mechanics, however, Diglett evolves into Dugtrio by advancing to Level 26.