you cant, the high tide comes in then the low tide comes
If you look every day, the cave will sometimes dry up and there will be these odd white piles of something on the floor (lol...) - this is shoal salt.
Low tide in Shoal Cave happens every 6 hours in Pokémon Ruby, Sapphire and Emerald. If it is not working for you then your internal battery may have run dry.
In shoal cave.
Shoal cave is north from mossdeep city.
Snorunt is found in Shoal cave.
North of Route 125
the old man in shoal cave will make you useful items with the shoal salt
combine it with shoal salt and create a shoal bell by talking to the dude in the start of the cave.
Yes in shoal cave.
Go to Mossdeep City, then SURF north and enter the Shoal Cave... There you will find Spheal...
depending on the time the tide will be higher meaning the cave is flooded during that time you can get shoal shells
In Shoal cave near Mossdeep city.