an auger
Get one of your Pokemon to use HM Cut on it.
When you see the strange entrance, use cut to open it. You MUST fall through the holes in this way: North hole. West hole. East hole. South hole.
when you stand in front of the doted hole us cut
use cut
Use cut on it.
Use cut on the door.
Use cut
You need to use cut to open itThe dotted hole is on 6 island and you need to you cut to get into it......
Use Cut on the door.
You have to use cut
Use cut
you use cut on it