Pokémon Ruby and Sapphire/Route 124

Route 124 is the first route in Hoenn which is mostly water. There's a couple of islands in the eastern portion, and some areas to into underwater paths - though you won't be able to access them immediately. You can also battle various trainers here.

The Treasure Hunter
On one of the islands, a treasure hunter can be found. He loves collecting shards of rock, which can be found all throughout the sea routes in multiple colours. In fact, he loves them so much that he is willing to trade valuable items for them!

Returning with Dive
After obtaining the ability to use out of battle from ../Mossdeep City/'s gym, you can come back here to dive underwater wherever there are dark spots. Some are essentially just underwater routes, while others hold hidden items and not much else.

Items Found
While all items listed here require and  to be accessed, the three items at the top of the list are not found in one of the underwater areas.


 * - Near the southwest corner of the route, via surfacing through the southwest-most Dive spot
 * - Near the northeast corner of the route
 * - North the northwest corner of the route
 * - In the empty square in the cul-de-sac of seaweed (Hidden)
 * - Directly beneath the central northern Dive spot, in the dark spot (Hidden)
 * - Directly beneath the spot closest Mossdeep City, in the dark spot (Hidden)
 * - In the Dive spot near the center of the route (Hidden)
 * - Directly beneath the second Dive spot north of the Treasure Hunter's house, in the dark spot (Hidden)
 * - Directly beneath the larger-than-usual Dive spot just southwest of the Treasure Hunter's house, in the dark spot (Hidden)
 * - Beneath the square Dive spot near Lilycove City, in the empty square among the seaweed, south of the underwater Dive spot (Hidden)