Its not in sootopolis city..its in an underwater dive area..I dnt remember where sorry..I would say u could refer to a video??..:)
Under water under sootopolis city.
it is in sootopolis city but under water in satapolis city Museum
You have to dive beside Sootopolis in different spots until you find one with an entrance, then you will find the sub. dive on route 128 and look for a cavern it should be there
the stolen sub is southeast of sootopolis city and west of ever Grande city but you have to have dive to find it.
Just Southeast of Sootopolis City, it's underwater so make sure you 1)beat Liza & Tate, 2) got HM08 Dive from Steven
there is no sub. only on Pokemon sapphiere and emerald. you have to defeat Team Magma, not Team Aqua.
Near sootopolis underwater
Ruby Grierson died on September 18, 1940, in SS City of Benares at sea of torpedoed by German sub.
at lilycove city is where i found it out
go to lilycove and head to the beach and surf up and you'll see a cave go threw it and you'll sea the sub at the end.
Use Dive with a Pokemon and Go through the water. You will see a hole. Go inside and Use dive to go to a new place.
Press b and it willl say light is flittering from above would you like to go up? and say yes. you are in sea cave. traverse through the cave until you find archie, battle him and then he will awake kyogre. then burn rubber and get to sootopolis city!