masta
he is in sinnoh u need poke transfer jerk
Its always too hard to catch. But you can use a Master Ball right away or a Quick Ball. Occasionally, if its weakened, you can throw a lucky Poke ball at it. That's how I got my Dialga!
you need action replay
You'll need a Pokemon and a Poke Ball.
Well it is fairly EASY to catch if you get it down to a sliver of HP left. DON'T USE YOUR MASTER BALL!!!! NEVER USE YOUR MASTER BALL ON DIALGA BECAUSE YOU CAN USE IT FOR CRESSELIA LATER ON IN THE GAME Don't use a Poke Ball but if your plays around Noon-7:30 pm use a Poke Ball, Great Ball, Ultra Ball Use Dusk Balls in 7:30 pm-6:00 am Because they work awesomely. FYI I was lucky enough to catch it in a poke ball but still don't try it unless Poke Balls are your only option
you don't need one. it comes in a event.
Once you have gotten far enough you will have to battle Cyrus at Mt. Coronet. After you beat all the people there you will get to battle dialga. I think this is your only chance to catch him so use a strong poke ball... but save the master ball for mesprit because it's hard to catch.
any kind, i used a pokeball
You need a lot of ultra balls and a lot of dusk balls
you catch it with a poke ball
You can't... ...Dialga is from Sinnoh, so why would you catch it in Unova? You'll have to use the Poke Transfer to transfer it over from Diamond or Platinum.
master ball