View Full-size

A giant underground trench, rumoured to lead to an ancient ruin (spoiler: it does).

Pokémon Encounters¶

Surfing

Same old Pokémon as in the rest of the sea. Hopefully your Repels haven’t ran out.

Fishing Rods

Name	Type	Location	Encounter Rate
Corsola	Water/Rock	Super Rod	5%
Luvdisc	Water	Good/Super Rod	35% (Good), 60% (Super)
Magikarp	Water	Old/Good Rod	65% (Old), 60% (Good)
Tentacool	Water/Poison	Old Rod	35%
Wailmer	Water	Good/Super Rod	5% (Good), 60% (Super)

Underwater

Name	Type	Location	Encounter Rate
Chinchou	Water/Electric	Seaweed	50%
Clamperl	Water	Seaweed	30%
Corsola	Water/Rock	Seaweed	4%
Lanturn	Water/Electric	Seaweed	15%
Relicanth	Water/Rock	Seaweed	1%

Local Trainers Pokémon¶

Name	Money	Party
Ace Trainer Cornelius	2,340	Golem Lv. 39, Raichu Lv. 39
Fisherman Wayne	1,184	Wailmer Lv. 37, Seadra Lv. 37
Tuber Delmar	152	Luvdisc Lv. 38
Tuber Marlene	152	Luvdisc Lv. 38
Triathlete Isaiah	1,440	Starmie Lv. 36
Free Diver Mayu	1,560	Luvdisc Lv. 39, Luvdisc Lv. 39

View Full-size

There are hidden items underwater too; if in doubt, mash the A button.

As you enter the Route, a big portion of it will be dominated to the south by that big circle thing you’ll sink into later. But first go east and battle the Ace Trainer.

Southeast of him is a Fisherman to fight (use the Dowsing Machine to find a Heart Scale near him), then a Tuber and some other Trainers further east. (To the curious, the name “Delmar” can be split into “del” “mar”, which - at least in Spanish - means “of the sea”.)

Surf onto the island west of the Fisherman and you can use the Dowsing Machine to find another Heart Scale . The Dive spot nearby - the small square one - has a Diver to battle and the Route’s underwater seaweed for Pokémon, so you know.

Aside from this, head to the big circle made of the shallows west of there. Enter the Dive spot inside the circle; underwater, examine the north-center part of the circle for an Adamant Orb , used to power up Dialga.

After that, go into the Dive area outside the circle (the gigantic Dive area) and enter the cave at the south side of said circle.