Diglett

Diglett appeared in 1996 video game called Pokémon Red & Green. Diglett is a Mole Pokémon. To farmers, Diglett can be a blessing or a curse! The soil that it lives in becomes rich and fertile, which is great for growing crops, but this Pokémon can also be destructive just by chewing on the roots of those crops.

Alolan Diglett
The metal hairs that sprout from the top of Diglett's head can be used to communicate or to sense its surroundings. It can extend just those hairs above ground just to make sure that everything is safe before emerging.

Appearance
Digletts are small, brown moles with two small eyes and a large pink/red nose. Since part of its body is underground, we don't know whether or not Diglett has feet, tail(s), etc. However, in Pokémon Mystery Dungeon Red Rescue Team and Blue Rescue Team, the rescued Diglett (after Skarmory kidnapped him) claimed to say his feet were getting cold (Which thereafter caused an awkward moment of silence).

However in its Alolan form the Diglett has three pieces of blonde hair that is on top of its hair.