After you get the Master Ball from Cyrus, go to Mt. Coronet and into Spear Pillar. After you and your rival beat Commander Mars and Jupiter, Cyrus will Summon Dialga. Then Uxie, Mesprit, and Azelf will come to stop Dialga. Then Cyrus challenges you to a battle. After you beat Cyrus, you can try to catch Dialga.
Behind Dialga when u beat him (only in Pokemon Dimand)
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you catch it in a gba game then catch it in the palpark
It depends if you have Pokemon diamond you find dialga at spear pillar to get palkia you need to trade or use action replay
After capturing Dialga (after defeating Team Galactic), the way will be unblocked.
Catch suckish Pokemon and lose every battle.
Dialga, Mespirit, Azelf, Uxie, Articuno, Moltres, Zapdos, and Heatran. Those are the ones I know.
You can only catch dialga in dimonid
If you beat Dialga and Dialga faints, you can no longer catch it.
You can't catch Dialga in Pokemon Black. You need to trade for it or transfer it from the older Pokemon DS games.
its is dialga
Sorry, you can't catch dialga in Pokemon black. You need to trade with a friend from an earlier game.