I can't speak for explorers of Darkness, but explorers of Time, palkia will bring you to a floor, and knock you off it, you'll go through 15 floors, and get to the mid-point center, then you'll go through 10 more, and fight palkia. Be very careful when fighting him!(note:he's not as hard as dialga) I suggest at least one reviver seed.
80 levlels
If you have already beat the game, go to solar cave. Get surf on the 20th (last) floor and go home. When you wake up commotion will be in the town blah blah blah you go to northern range and fight latios. He then asks you to save his sister latias in pitfall valley. (Both places are 25 floors). After this they ask to join your rescue team. Make sure you bought their friend area (southern island)
Just go to the right in crossroads (south of the guild above the beach) so you can go to a dungeon, scroll down the list until you see spacial rift and you pass 15 floors then about 8 floors and then spacial rift bottom location of PALKIA battle him\her he has about 650 hp the second time you battle him.
You have to complete the game fully, including the post-game plot and unlocking the Marine Resort dungeon. Spacial Rift will also reopen, it will not mention this, but it will now be on your location list.
Upon your second visit to the Spacial Rift, Palkia will be able to be friended.
20 floors in all, counting the boss floor. 10 top, 10 bottom ( but really the bottom has 9.)
Go to Spacial Rift with a Secret Slab, Mystery Part, and a Golden Mask and on the tenth floor, Latias will be there. P.S. You keep going and on the fifth floor of Deep Spacial Rift, Latios will be there as well.
he is at the end of spacial rift which is 20 floors in spacial rift 10 in deep spacial rift
15 then 9
Spacial Rift has 15 floors. After Spacial Rift, Deep Spacial Rift has 9 floors. Finally there is the boss room with Palkia. I recommend using the same strategy as Dialga, but Palkia has different strengths and weaknesses. Here they are. Strong Against Fire Ground Rock Dragon Weak Against Dragon
80 levlels
Around 10, i think
You should already have spacial rift on your list.
chatot tells you about palkia and when you go home palkia comes in and brings you to spacial rift.
I think it has 20 first floors and in deep spacial rift 20 floors and that equls 40.
If you have already beat the game, go to solar cave. Get surf on the 20th (last) floor and go home. When you wake up commotion will be in the town blah blah blah you go to northern range and fight latios. He then asks you to save his sister latias in pitfall valley. (Both places are 25 floors). After this they ask to join your rescue team. Make sure you bought their friend area (southern island)
After a couple of your dreams with "cresselia" you will get an idea to go the beach to see lapras to ask him about the distortion of space or something. He will tell you about Palkia and Spacial Rift that night Palkia will come and take you to spacial rift. Good luck!