There's an entrance to it on Route 32.
You find it in Union Cave.
walk?? look around!!
it's in the union cave. On friday's just surf and they'll be around level 20
get the TM surf and waterfall and youll pass it
by going to union cave and finding the hidden way
It is south of Violet City and east of Azalea, or in other words it's the cave between Violet City and Azalea Town.
Talk to the fisherman NPC in the Pokemon center near the entrance to Union Cave.
There's that grass patch outside of Union Cave (I really don't know the number.)
Go to the route south of the city faulkner is the gym leader of and then through union cave
You tell me
Cerulean Cave
Azalea town can be reached by going through union cave after exiting head west and you will be in Azalea town.