Im a pokemon freak myself and by my studys Palkia and dialga defeats themself. dialga stops time and palkia is in space. so my closes bet would be dialga cuz he has time.
easy pokemon rules i love all card games, but truth Dialga would win because it can learn Earth ripper that does an automatic 250 damage and its super effective on palkia so if you learned that move dialga would win
Infernacron, people dislike Pokemon a lot. Don't get the boys more hating the Pokemon legacy. Girls might like it but I highly doubt that every girl will like it. I think that they would probably both lose to something like a Shiny Palkia or Dialga?
i dunno how late i am to the party.. but it would end in a tie. Palkia would freeze space around Dialga, simultaneously stopping time around Palkia, therefor both would be trapped, stuck, unless Giritina Distorted the frozen time and space around the two causing both to collapse, releasing Palkia & Dialga from stasis. Now, if Giritina went up against Palkia and Dialga, their powers would get Distorted and be rendered ineffective, and the 2 would be stuck in stasis again. end of story. Thats how it would it would go down if you actually try to answer that question. A similar event would happen with Groudon and Kyogre + Rayquaza. as well as The new Gen 6 trio. and Reshiram, Zekrom, and Kyurem.