Yes 'cause I have both Dialga an Palkia!
You get Palkia in a dungeon called spacial rift.
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Different story more Pokemon Like Palkia Dialga.
Yes, you can. First recruit palkia in your team and after manphyreturns and tells you about the marine resort your Pokemon canevolve in the luminous spring
you have to graduate from the guild & recruit dialga & palkia then go to luminous spring.
you can do it n u need to have that in order to evolve and already completed the manaphy event.
Pokemon mystery dungeon explorers of time.
No.
beat darkri and wait a couple of days (you may or may not need palkia and/or dialga)
The same way you do in Pokemon explorers of time. You have to go to some mission in the spacial rifts then you have to be the person to hit him last, if your partner hits him. It will just say you defeated Palkia, oh and I don't remember how to get the mission on the spacial rift, nor do I know how to get the dungeon. Well, hope I helped. :)
To get the dungeon Sky Fissure, you must complete The Nightmare and Talk to Lapras. Then go to bed and at night Palkia will transpoet you to the Sky Fissure. BE WARNED! you will have to fight Palkia at the end! Hope this hepled! Shinin
In Pokemon Mystery Dungeon Explorers of Time it is impossible to get Mewtwo. You are only able to get it in Explorers of Darkness.