If you power up first you still need to evolve it eventually and if you get a bad moveset then you've wasted more candies (and also stardust) than if you had only evolved.
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Pretty much the only answer you need.
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thats what i figured thx
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1st Rule... Evolve first!
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Check IV > Power up if need exactly IV > evolved > check move set > happy move set > power up !!