Of course, after that, I had to head east from Mahogany, into the Winter's Edge. There I encountered a Dugtrio, stating that they had gotten separated from their child Diglett, and that Trainers were blocking their path. They implored me to rescue Diglett.
The Trainers were no problem. Plusle comes in very handy for most Trainers. How anyone can overlook this little guy is beyond me.
Reaching Diglett, therefore, was also no issue, and upon finding it, I let it know that it was safe to go back the way it came, back to its loving family at the very edge of Mahogany. I hope they find peace.