I'd use a master ball if you have one or a dusk/dawn or something ball.
wen u get masterBALL throw it on dialga or palkea
with ultraballs if giratina condition is weaken
You try to get Dialga to low Hp and use many pokeballs/ great balls / ultra balls to try to catch it. It help if Dialga has a status problem such as being asleep or paralizes.
pokeballs
pokeballs... which should be at the mart..
you get it by finding all the Pokemon in the sinnoh pokedex.remember that u don't have to catch them for it to count in your pokedex if you don't know who your missing you're probably missing 152 rotom in the old chateau in eterna forest or dialga and palkia you get the orbs by going to this one cave in mt. coronet and there should be 2 pokeballs in it and a rock the 2 pokeballs should be the orbs andd the rock should be an item. after that you can go to spear pillar and catch both of them
yes and then u can catch more pokeballs.
dialga bring about fifty or more pokeballs weaken it till it's hp is yellow/red but DON'T DEFEAT IT!!!!, p.s you find dialga at spear piller when you defeat Cyrus, trainer's note. you can only catch dialga on diamond. you can only catch palkia on pearl. you can catch dialga palkia/AND GARITINA!, i have platinum and caught all of then so i know post a question about how to get garitina on Pokemon DIAMOND! Actually in Diamond and Pearl u just need the Master Ball that Cyrus Gave you beforehand!
If you beat Dialga and Dialga faints, you can no longer catch it.
It depends on which game. you can catch dialga on pearl with a code
You can catch it by first turning Dialga's HP into the red. Then use Ultra Balls or Dusk Balls to catch Dialga. It will take time, and you need to use a few balls to catch Dialga.
Dialga is the only pokemon that can use it, and it should already have it when you catch it.