Where is the return cave in pokemon diamond please give me the route number

Question

Where is the return cave in pokemon diamond please give me the route number

Answer 1

first fly to veilstone and head south and you should notice a new path has opened up called spring path, go to the end of the path and your gonna need hm rock climb and soon your gonna reach the cave where at the end is giratina at lvl 70 btw you should be using ultra balls, dusk balls ,and timer balls

btw to find giratina I recommend you just go north so you may need hm rock smash, btw none of this matters if you don't have to national dex, which can be obtained after seeing all 150 pokemon

Answer 2

I think you mean Turnback Cave, the home of Giratina.  It's located at the end of Spring Path which is a side route going to the east on Route 214.  You don't need to beat the Elite Four to get there.