How would I know if I have a drizzle Politoed?

Question

If I'm trying to get a drizzle Politoed, how would I know from its Poliwag stage?

Answer 1

If Poliwag has the Swift Swim ability, then it will always evolve into a Drizzle Politoed.

Since Swift Swim is Poliwag's Hidden Ability, and a Pokemon will never change from its Hidden Ability to a normal ability, if it has Swift Swim it will evolve into a Politoed with Drizzle.

Answer 2

You would know if Poliwag had Swift swim.

Hidden abilities carry over, and since Swift swim is Poliwag's hidden ability it would carry over and change into Drizzle when evolved into a Politoed.

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Source: knowledge
Hope I helped.