If a dual type Pokemon his hit with two moves that adds a type onto it, does it become a quadruple type?

Question

Let's say if I had a pidgey, and it was hit with forests curse and soak, would it be normal flying water grass or would one of the last types replace eachother or what?

Answer 1

Different type-changing moves have different interactions, but none will ever result in a Pokemon with a quadruple typing.

• Forest's Curse and Trick-or-Treat add Grass and Ghost respectively. If a Pokemon is already afflicted by one when the other is used, it will be replaced.
• Soak and Magic Powder replace the target's typing to Water or Psychic respectively. A Pokemon hit with one of these will always have just one type (unless later hit with Forest's Curse/Trick-or-Treat).

Type change (Bulbapedia)