The underwater cave is located in route 128.
You can find quagsires in mt.silver cave. And woopers in the route under violet city
Use dive on route 126 and go to the end of the under water cave therevwill be a cave use dive to go up inside of the cave and you're there
on route 126 there is a dive patch work your way round until you see the cave under water there you go into the cave and go up
they are in Pokemon emerald, sapphire, and ruby you must have dive and dig(i might have missed a few) regirock= go to desert cave at route 111 regice= go under water at route 126 registeel=cave at route 120 certain actions must be taken before available to find
Water cave is west of route E. You need rock smash to get farther in the cave
Go speak to the weatherman near Fortree then he will tell you a route (it is randomised). Go to the route (which should be on water). Look for a smallish dive spot that wasn't there before. Once your under water there is a cave called Marine cave and he/she should be there :) hope this helped
in the under water cave. it is in route 127.
At a cave under water in route 128 :)
You can get Gible on Pokemon Diamond in the Wayward Cave hidden under Cycling Road in Route 206. You will need the HM move Strength to access the cave.
the dark cave can be entered on route 45 or route 46
route 111
Wayward Cave