Its shinjo ruins and you need to bring only arceus to the ruins of alph and you will find cinthia and she will bring you there
take arceus to the unown ruins
Shinto Ruins
well is´NT exactly a region, the Shinto ruins are localized in Sinnoh, and for unlock it you need to show an event Arceus to the old man inside the house of the Ruins of Alph, then the guy will lead you inseide the unown ruins and you will be transported to the Shinto Ruins.
event place.
Shinto Ruins is only obtainable if you have an Arceus.
The Sinjoh Ruins are somewhere to the north of Johto, only accessible by an Nintendo Event.
There is not a place called "Shinto Tower". There is the Sinjoh Ruins (available by event only) and various towers, however.
In the English version, it's Sinjoh ruins. You have to have an arceus from the event and trade it over from DP.
Once you have Arceus, go to the Ruins Of Alph and you'll be able to go to Shinto Ruins.
Diagla can be found in the Shinto Ruins.
In order to get into the Sinjoh Ruins, you have to have Arceus first in your party, and walk into the ruins research center. I believe you must also have the National dex. EDIT: You do not have to have the national dex.
its not in the johto or kanto region. bring arceus to the unknown ruins. then a guy will alow you to go to the ruins where u get a LV1 giratina dialga or palkia with repective orbs