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!
After obtaining the ability to use {{bpm|Dive}} 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.
While all items listed here require {{bpm|Surf}} and {{bpm|Dive}} to be accessed, the three items at the top of the list are not found in one of the underwater areas.
==Trainer Battles==
*{{bpi|Blue Shard}} - Near the southwest corner of the route, via surfacing through the southwest-most Dive spot
*{{bpi|Yellow Shard}} - Near the northeast corner of the route
{{pokemon trainer
*{{bpi|Red Shard}} - North the northwest corner of the route
|image=PRS&E Sis and Bro.png
*{{bpi|Carbos}} - In the empty square in the cul-de-sac of seaweed (Hidden)
|details='''Rita & Sam'''
*{{bpi|Calcium}} - Directly beneath the central northern Dive spot, in the dark spot (Hidden)
*{{bp|Lanturn|51}}
*{{bpi|Heart Scale}} - Directly beneath the spot closest Mossdeep City, in the dark spot (Hidden)
*{{bp|Sharpedo|49}}
*{{bpi|Heart Scale}} - In the Dive spot near the center of the route (Hidden)
}}
*{{bpi|Pearl}} - Directly beneath the second Dive spot north of the Treasure Hunter's house, in the dark spot (Hidden)
*{{bpi|Big Pearl}} - Directly beneath the larger-than-usual Dive spot just southwest of the Treasure Hunter's house, in the dark spot (Hidden)
{{pokemon trainer|game=E|two=yes
*{{bpi|Green Shard}} - Beneath the square Dive spot near Lilycove City, in the empty square among the seaweed, south of the underwater Dive spot (Hidden)
|image=PRS&E_Swimmer_M.png
{{-}}
|details='''Swimmer Declan'''
*{{bp|Gyarados|34}}
|pokebuck=272
|image2=PRS&E_Swimmer_F.png
|details2='''Swimmer Grace'''
*{{bp|Marill|34}}
|pokebuck2=272
}}
{{pokemon trainer|game=E
|image=PRS&E_Swimmer_M.png
|details='''Swimmer Spencer'''
*{{bp|Tentacool|33}}
*{{bp|Wingull|33}}
|pokebuck=264
}}
{{pokemon trainer|game=E
|image=PRS&E Sis and Bro.png
|details='''Lila & Roy'''
*{{bp|Chinchou|34}}
*{{bp|Carvanha|33}}
|pokebuck=792
}}
{{pokemon trainer|game=E
|image=PRS&E_Swimmer_F.png
|details='''Swimmer Jenny'''
*{{bp|Wailmer|34}}
|pokebuck=272
}}
{{pokemon trainer|game=E|two=yes
|image=PRS&E_Swimmer_M.png
|details='''Swimmer Roland'''
*{{bp|Carvanha|34}}
|pokebuck=816
|image2=
|details2='''Triathlete Isabella'''
*{{bp|Staryu|34}}
|pokebuck2=816
}}
{{pokemon trainer|game=E
|image=PRS&E_Swimmer_M.png
|details='''Swimmer Chad'''
*{{bp|Tentacool|33}}
*{{bp|Wailmer|33}}
|pokebuck=264
}}
== Items==
* Blue Shard - requires dive, found by surfacing in southwest area
* Yellow Shard - requires dive, found by surfacing in northeast area
* Red shard - requires dive, found by surfacing at in northwest area
* Carbos - hidden in clearing in seaweed patch in the S-shaped trench
* Heart Scale - hidden in the dark spot beneath the dive spot closest to Mossdeep City
* Heart Scale - hidden in the dive spot in the center of the route
* Calcium - hidden in the dark spot beneath the north-central dive spot
* Pearl - hidden in the dark spot below the second dive spot northwest of the Treasure Hunter's house
* Big Pearl - hidden in the dark spot directly below the dive spot southwest of the Treasure Hunter's house
* Green Shard - hidden in a seaweed clearing below the small dive spot near Lilycove City
{{Footer Nav|game=Pokémon Ruby and Sapphire|prevpage=Team Magma Hideout|customprev=[[Pokémon Ruby and Sapphire/Team Aqua Hideout|Team Aqua Hideout]]|nextpage=Mossdeep City}}
{{Footer Nav|game=Pokémon Ruby and Sapphire|prevpage=Team Magma Hideout|customprev=[[Pokémon Ruby and Sapphire/Team Aqua Hideout|Team Aqua Hideout]]|nextpage=Mossdeep City}}
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 Dive into underwater paths - though you won't be able to access them immediately. You can also battle various trainers here.
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!
After obtaining the ability to use Dive 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.
Fire Stone
Leaf Stone
Tentacool
Wingull
Pelipper
Magikarp
Wailmer
Sharpedo
Marill (lvl. 33) 
264
Chinchou (lvl. 36) 
Carvanha (lvl. 34)
Gyarados (lvl. 34)
Staryu (lvl. 34)
Clamperl
Relicanth