First, insert the Odd Keystone that you got from a karate man into the tower that is broken (Hallowed Tower) south of Solaceon Town and talk to 32 people underground, after that go back to Hallowed Tower and press A. Spiritomb will be there.
at the relic castle
Same thing you do in Diamond and Pearl, talk to 32 people underground.
try your best to find spirtomb in Pokemon platinum
NO you cant catch syther in Pokemon pearl
You can't catch a charizard in pokemon pearl.
Spirtomb can't learn shadow force at anytime.Answer:I believe Spirtomb learns shadow force around level 55!
neither of them is better, they are both the same, but in diamond, you catch dialga, and in pearl, you catch palkia, and you can catch different Pokemon in each game for example: you can catch this Pokemon in diamond, but not pearl but: you can catch this different Pokemon in pearl, but not diamond
you can certainly catch Dioxies in the game Pokemon pearl
It's impossible to catch Jiratchi in Pokemon Pearl version.
Spiritomb is not a wild pokemon on SoulSilver/HeartGold. It must be traded from another game-e.g. Diamond/Pearl/Platinum.
In Pokemon Diamond and Pokemon Pearl, there is no possible way to catch a Giritina. You can, however, either catch one in Pokemon Platinum or trade with someone who does have one. In Pokemon Pearl, you catch Palkia at Spear Pillar. In Pokemon Diamond, you catch Dialga at Spear Pillar.
You can't catch it in Pokemon pearl unless you have an action replay. But if you did catch it in Pokemon emerald, sapphire, or ruby, then you can migrate it