Pokemon Brilliant Diamond/Shining Pearl: What is Palkia's Weakness?

So idk if this has been brought up yet, but if you look on google it says that palkia is salamence type (mind you salamence is the dragon pokemon) on top of

Pokémon Palkia G LV.X 125/127 Damaged Platinum Base Set Ultra Rare RIPPED 008

Dialga X Palkia Pokemon card by Ace70000 on DeviantArt

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Pokemon GO Palkia Raid Boss Time: Best Pokemon to counter and exploit Palkia weaknesses - Daily Star

04/25 - Palkia (Holo) – Indigo Cards

Arceus & Dialga & Palkia GX SM - Cosmic Eclipse NM/M - 156/236 : Toys & Games

Palkia [G] - 12/127 - Holo Rare - Reverse Holo - Pokemon Singles » Platinum - CoreTCG

Pokemon Platinum Palkia LV 72 37/127 Rare Holo Reverse Eng