>>48926837nta.
Dunno about the Sinjoh ruins but there's this from postgame BW and pic rel:
>During the post-game, Cheren reveals that theShadow Triadhad helped Ghetsis to escape. When the player meets the Shadow Triad for the final time onMarvelous Bridge, they reveal that Ghetsis is currently on the run. He has lost everything, including his Pokémon, and only the Shadow Triad are still loyal to him. For some reason, he has ordered the Shadow Triad to stop looking for him and deliver the player theAdamant,Lustrous, andGriseous Orbs. 