I think you meant DIALGA. And yes, you have to defeat them to capture this pokemon. It is found at the spear piller. Dont forget to re-enter to get palkia ;)
In the distorion world If u defeat it, beat the pokemon leauge and, it will apper in Turnback cave.
Catch a certain amount of Pokemon and defeat the elite four to change your card from copper to bronze to silver then gold.
You cannot find zekrom in pokemon platinum
only if you have the catch trainers Pokemon code
You cannot catch it in platinum but only in ruby, sapphire and emerald.
you will encounter giratina, either catch him that's best, or defeat him
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.
In the distorion world If u defeat it, beat the pokemon leauge and, it will apper in Turnback cave.
it depends how many Pokemon you defeat and/or catch
you can not catch him you have to migrate him from Pokemon emerald, Sapphire, or rubyActually you can catch him on platinum and platinum only. you can find him in the sandstorm place in a cave somewhere after you defeat the elite four.Regirock can be captured in the Rock Peak Ruins on Route 228.
how do you catch a mewtwo on Pokemon platinum
you have to catch/defeat giratina and then you'll be able to go to sunyshore city
you cannot catch the 3 regi's in Pokemon platinum you have to catch them in Pokemon emerald then transfer them to Pokemon platinum. thnx
You can't actually catch him in Pokemon platinum but you can migrate him over to platinum if you have him in another game
you can't catch him in platinum but in soulsilver or heartgold you can catch him then trade it to platinum.
If you mean Milotic, if you want to complete the Pokedex it is nearly impossible to catch in Sinnoh. However, the Champion has one so if you defeat Pokemon League you will see it.
vulpix is not in Pokemon platinum version.