The Crumbling Stone tower is used with the underground feature in platinum, to unlock Spiritomb, the dark\ghost type pokemon. You need the Odd keystone[needed to unlock the tower], Google it if you dont alreayd have one. Then you need to go underground and talk to one of your friends 32 times[you can go in your base, out again, talk to the person, and repeat], once you do this, go to the crumbling stone, and interact with it. This triggers a battle with a spiritomb[i think its level 25]. Its worthwhile to catch, as it really has no weaknesses.
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You don't, it is used to catch spiritomb after meeting 36 people underground
No you need to put the odd keystone in the crumbling tower, go underground talk to a friend 32 times (does not include explorers) and then go back up. talk to the crumbling tower just south of solaceon town and you get spiritomb.
You have to go to your home city in platinum surf go to the corners and press a and you should find a hidden keystone sothen you fly to the town where the pokemon daycare is and keep going down until you see a crumbling tower use the odd keystone go under groundtalk to ten people go back up press on the tower ando
Iron Thorn Z Pokemon Questions HelperAnswer: First you have to get an Odd Key Stone. Then go to Route 209 and place it in the Spirit Tower Well, a well made of stone. You can get the Odd Key Stone by diging in the underground or by finding it, lying about sinnoh. After Placing the Odd Key Stone into the Spirit Tower go to the underground, and talk to 32 people (friends) via wireless(Hikers don't count). After talking to all 32 people, get back to the Spirit Tower and talk to it. You will battle Spiritomb at a fairly low level. Hope That Helped!
You just get lots of stone together and build loads of fortresses together. Make little watchout towers with a small stone tower and some decorative blocks at the top.