Dive & Abyssal Ruins

After you have beaten the Elite 4, you can get Dive from your rival in Undella City.. Just like BW, there's only one place where you can use Dive.. You can use Dive on the dark spots in the middle of the sea.. You can find those spots in Undella City, total 4 spots/entrance.. Once you dived, you will be in Abyssal Ruins..

So you asked what's this place for? Only for two minor things.. One is plates for Arceus.. The other is for money or collection or achievement.. Here, you will be able to get the most expensive stuff you can get from the game, it's the Relic items.. However, it's not an easy task getting it.. You have time limit once you dived, more like the number steps you can swim.. If you passed the limit, you will be return back to the top of the sea.. You will have to start from scratch, but the items you have taken there will permanently be yours.. So you might need to try going down few times..

I don't really recommend you to do this unless you are a perfectionist.. I know the trouble since I did it for BW.. If you still insist, then I suggest you to find the underwater map and things you might need to proceed to each floor through the net.. The map is still the same like the old BW.. You will need Dive HM, Flash TM and Strength HM user(s) to pass through the 4 floors...

First floor's mission is the annoying one.. You will have to get to the middle pillar (red pillar with texts) within a certain amount of steps.. Means, you are not allowed to take any item or do any mistake, otherwise the pillar won't move, hence you won't be able to access to the next floor.. If you fail, you will have to swim until you reaches the time limit to return back to top.. So might as well spend some time to take some items before it happens.. Here, you will be able to get Arceus plates..

The second floor requires you to use Flash on the red pillar, and the third one requires Strength.. The last floor will be a room with only one item, that's Relic Crown.. If you take it to a man in Undella Town (west-most house), he will buy it for 300k Pokedollar, it's optional to sell it of course.. Once you have reached the bottom, talk to Rood, he will give you Big Pearl..