Diglett's Tunnel (Japanese: ディグダトンネル Digda Tunnel) is a location on Akala Island in Alola, connecting to Heahea City in the north and Route 9 in the south.
Dugtrio can sometimes be seen traversing inaccessible rocky portions of the cave.
An isolated area of Konikoni City can be accessed from Diglett's Tunnel using Machamp Shove.
Sometimes, after a Diglett from a dirt cloud is defeated or caught, it will drop an item.
A Nihilego can appear here or at Wela Volcano Park during the first Ultra Beast mission, initiated by speaking to Looker on Route 8 after becoming Champion. It has an aura that gives it +2 Special Defense stages.
Hau will join the player in a Multi Battle against a pair of Team Skull Grunts.
If the player chose Rowlet:
If the player chose Litten:
If the player chose Popplio: