windexerd
Trainer
If you're surfing back to Olivine City from Cianwood, you can see a Lass/NPC/Girl/Someone under the building that I believe leads to the Battle Frontier. You can see it from around the bend that occurs in Route 41, kinda just above the Whirl Islands and to the left. Screenshot below shows her, though its a little difficult to see... Shes the smudge just below the coastline to the slight upper left of the cursor.