Does Soak affect Arceus?

Question

Multitype changes its type, so does it?

Answer 1

No,A Pokémon with Multitype is unsoakable.
http://bulbapedia.bulbagarden.net/wiki/Multitype#In_battle

Comments

HeHe, unsoakable, what does that mean?

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It means the Move Soak will not affect it. Soak changes the opponent's type to Water.