Quoted By:
Unable to withstand the harsh sun of the Alola region, the first Diglett's and Dugtrio's of the region started leaving underground all the time. Little did they know that you could find plenty of Aloe, the national plant of the region, in the ground of the region!
After prolonged contact with those plants, Diglett's have started to grow hair! These hair also allowed them to come out of the ground, protecting them of the sun.
Ground/Grass Pokemon