I wrote a long rant about this in the GB Strategies and Movesets discussion about Dialga and Palkia and I'm not going to type it again. They both counter different Pokémon in the Uber metagame and both counter about the same amount as well. In a one-on-one fight Dialga would win because of that incredibly schmexy STAB, super effective Draco Meteor. Palkia will be at a disadvantage because of a lack of STAB super effective move. But as I already said, they're equally useful, but I personally prefer Dialga because of a schmexier type combination. I'll have one more type being super effective against my Pokémon for tons of resistances in return any day.
First of all, Dialga is not a he, neither is it a she.
Second, since when has a type combination that was already introduced in G/S/C been original? Don't give me that ''Dragons can't breathe fire underwater'' because a fire-breathing dragon is just a western stereotype. I believe there are dragons of every element in Chinese mythology (And those would be Fire, Water, Wind, Earth, Metal, Wood and I forgot the rest of the elements in Chinese horoscopes.) so when you look at it, both type combinations are about as unique as they've both been taken from Chinese mythology anyway. And the ''most of its moves suck'' argument isn't too great, either, as it still has 3 standard sets that are all functional. (Choice Specs/Life Orb sweep, Trick Room sweep and Choice Band/Life Orb sweep)
Most dragons can learn Water moves. -.- All Dragons, as a matter of fact can learn a Water move if Rain Dance counts (which will count by all logic as it's still a Water move). The following out of the 19 existing Dragon types can learn Water moves (excluding Rain Dance):
Kingdra, Palkia, Latias, Latios, Bagon, Shelgon, Salamence, Dratini, Dragonair, Dragonite, Garchomp, Rayquaza. That makes over 50% of all Dragon types and yet you say almost no Dragon type can learn Water moves? Check your facts, please.
So far you've only managed to prove you have a severe lack of evidence behind your arguments, not that you're right.
Stallers fail anyway, so what difference does it make?