It is underneath cyciling road so it's invisible from bird-eye view but it's a the very & it is clos to the normal entrance (Gible is in there XD)
use a shiny stone. they can be found at the end of the cave on iron island or route 228
beat the freakin elite 4 get the nat dex
The turn back cave in Pokemon Platinum is in Seodoff Spring near veilstone city
You catch Hippowdon at Route 228 where the sand is and you catch hipportas at route 224 in the ruin maniac cave which evolves to Hippowdon at lv34
giratina the Pokemon that's in platinum is found in wayward cave
I think its Dark Cave, I have 2 platinum games.
Get Regigegas from the giveaway and go into the cave on route 224
In Pokemon Platinum, a Protector can be found in Route 228 and on Iron Island in the basement floor one of the left cave.
Go to Route 214 and go in the ruin maniac cave.
Get the natinal dex
route 214 near cave need rock smash.
The Ruin Maniac's Cave. Which is on the face of the mountain on Route 214.
You must have transfered the Event Regigigas to Pokemon Platinum. Only then will you be able to get the three Regis.Regirock: Found in a cave on Route 228.Regice: Found in a cave in Mt. Coronet near Route 216.Registeel: Found in a cave in Iron Island.
There are several. One of them is the second cave in that route under the biycicle road thingy.
you find the magamarizer on route 214. it is not long away from the ruin maniacs cave
In Turnback Cave after Spring Path on route 214 (must find in cave after many rooms)
beat the freakin elite 4 get the nat dex