To catch palkia you will need to trade him with Pokemon pearl. NOTE: You catch palkia in pearl and dialga in diamond.
Sorry to say, but no, you cannot catch a Palkia on Diamond version. You catch a Dialga on diamond, and Palkia on pearl. You would have to trade to get one.
You cannot catch palkia in pokemon diamond!
You cannot catch palkia in diamond and dialga in pearl but you can catch both of them in Pokemon platinum
You cant get palkia in diamond if you play diamond and you trade you STILL cant get palkia only in pearl you can get palkia
You can't catch palkia (if you have diamond) You could trade.
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You can't catch Palkia in Diamond. You'll have to trade it from Pearl, Platinum, Black2 or OmegaRuby. You can also trade it from HeartGold/SoulSilver, Black, X/Y or AlphaSapphire, if you've visited an event.
You can look at the picture of Palkia in Celestic Town to put it into your pokedex, but you can't actually catch it in diamond.
Palkia
In a way. In pearl, you catch palkia. And in diamond, you catch dialga.
To catch Palkia, you have to get a Lustrous Orb from Pokemon Pearl, and an Adamant Orb from Pokemon Diamond. Then you have to go to Temporial Tower. You will have to catch/defeat Dialga first, then catch Palkia.