Isle of Armor Diglett locations: Workout Sea
Last but not least, we have the Workout Sea. This area is enormous with lots of islands and 11 Diglett to find in total, so hop on your bike.
Enter the Workout Sea from the Isle of Armor train station then take an immediate right turn to head west. You'll come across an isolated beach; grab the first Diglett from there.
Now head directly south to the large island where you'll find an entry point on the west-hand side. The next Diglett is on the sand here.
Diglett number three is at the crest of the hill, by the red flowers.
At the other side, you'll find another Diglett on a ledge.
Now go east for quite a while and aim for the small sandy island with a rock in the middle. There's a Diglett behind it.
There's another, larger sandy island north-east of there which has a Diglett by the raid den.
Go to the next sand island to the south-east and you'll find yet another lone Diglett.
Now go to the larger, grassy island in the north-east corner of the Workout Sea. One Diglett is in the far corner, past some red flowers.
In the middle there's another, by a rock with an item.
Then cross to the western side of the island for another.
The last and final of all 151 Diglett locations is just a few steps past that, in the shadow of the big tree.
Congratulations! You've found all 151 Diglett and you can get your rewards from the Diglett Trainer.