use cut
North of One Island.
Island 6 near the edge
it is in ice fall cave on four island but you need to find it somewhere in the cave
Most strong Pokemon can be found also at seven island
Wild Pokemon level 50 and higher can be found at seven island and cerulean cave.
On island one, there is a cave with a ruby and a full set of braille alphabet.
You cannot get to Fire Island on Pokemon LeafGreen. Fire Island is a setting exclusive to the second Pokemon movie, Pokemon the Movie 2000.
you need to become Pokemon League Champion then help Celio on One Island to get his computer running
fire cave
I think the best place is cruelean cave, ninjas on kindle road (on island 1), and victory road.
there is no diglett cave in Pokemon ruby only in leaf green and fire red
go to the fire cave