Under water under sootopolis city.
there is no sub. only on Pokemon sapphiere and emerald. you have to defeat Team Magma, not Team Aqua.
Pokemon ruby's version IS Pokemon ruby.
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.
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.
ruby
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
All The Shiney Pokemon You Can Get In Pokemon Ruby Are All The Pokemon You Can Get in Ruby Any Pokemon Can Be Shiney Even Starters and Legendaries. So There Are 200 Shiney Pokemon You Can Get In Pokemon Ruby.
You can trade from Pokemon Ruby to another Pokemon Ruby using a link cable.
Pokemon from the 3rd gen (hoenn region) are in ruby
you can't get the pokeradar in Pokemon ruby
you can't, only ruby Pokemon can go to diamod. but diamond Pokemon can't go to ruby
pokemon ruby, saphire, and emeraldyj