You go to the victory road cave thing its on the island far to the right of sootopolis city you basically need just the HM waterfall move to get up there.
well if it's a wailmer then its in north eastern sootpolis
you use the move you get from wallys father hm2 surf and go to sootopolis city
first you must have moves dive and surf when you are at sootpolis city return to the real world and surf to route 128 you will see a blue thingy dive there and dive till you see a opening go inside there and use dive again wala the seafloor cabin
There is not a retazo city in ruby.
Ruby is a Ghost City. By 1942 it had no residents.
He is in a seafloor cavern. You have to use dive and go inside a little cave thing. the cave will have the submarine in it. Also its called Sootpolis city not sootpoo
Once you get the HM dive and make it to mossdeep city you can surf southwest somewhere you will find white rocks you can dive down and you will find a secret cave underwater if you resurface in the cave you will appear in sootopolis city.
Evergrande City can be found from Route 128 (South of Mossdeep, South East of Sootpolis), you need to get up the Waterfall and travel through Victory Road to get there.
the daycare in Pokemon ruby is between verdanturf city and mauville city
Saffron city is in the Kanto region, which is not in Pokémon Ruby.
Flannery is in lavaridge town in ruby
Sootopolis city.