How Do You Get Spiritomb In Pokemon Platinum?

Go to Route 208. Talk to the person with the headband just south of where you enter the route. He will give you the Odd Keystone. Next, go to Route 209 south of Solaceon Town. Place the Odd Keystone in the fissure in the ground that resembles a small volcano, which is actually called the Hallowed Tower. Then, talk to 32 people in the underground. Note: Hikers do not count. However, you can have one friend with the game go into the underground, talk to your friend, go up, then back down 32 times. The Hallowed Tower will now be restored. Go inside to catch a Spiritomb. Its appearance is rare, and is very hard to catch. Using the GTS is probably easier if you want to get one since you'll be seeing one much later on in the game.

You put in the odd keystone in the hallow tower in route 209 then go underground and talk to 32 people and go up get any needed pokemon and then talk to the hallow tower and there will be a lv.25 spirtomb.

You must first get a odd keystone from a blackbelt dude then go to route 209 place the odd key stone in the hollowed tower then talk to 32 people ( doesnt matter if the same person) and go into their secret bases next talk to the hollowed tower and you fight spiritomb at level 25

Do the people you talk to have to be real people? Aka Can you talk to those hiker people underground that give you items for gems?

I don't have 32 friends that play pokemon
I do have a dialga though
 

Sorry but you have to talk to 32 people underground
but if your looking for spritomb on soul silver or heart gold you would need to trade

I've been breeding them and have loads to trade over wi-fi! PS: Ive got a page for a spirit tomb trade offer: Will someone trade me a Dialga for a Spiritomb!!! (its rare). PS: Its lv 1.