Our software update is now concluded. You will need to reset your password to log in. In order to do this, you will have to click "Log in" in the top right corner and then "Forgot your password?".
Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
I think Dialga would... ^^
SInce they're both dragons, they both use dragon type moves which is super affective on Palkia. It's not as affective on Dia becuase he's also steel type.
EDIT: Don't mind me, I just point out the obvious.
That's stupid. This is pokemon, he doesn't mean fights with fists you eejit. Anyway, Dialga would win. He resists both of palkia's stab moves and has a killer special attack stat.
If you put it in a battle with eachother, Dialga would win since it resists both Palkia's STAB moves. But if you measure them in overall strength, Palkia would win since it not only has only one weakness, but it has access to a very powerful dragon-type move.
Dialga. Just look at the movie as well, ;D It injured Palkia at the beginning with I think was Roar of Time. And Palkia's move pretty much didn't affect it too much.