Should you purify Shadow Regigigas in Pokemon GO?

Regigigas is making a comeback in Pokemon GO, and this time, it is available in Shadow form.

Should I purify? : r/pokemongo

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Pokemon Go: Should You Purify Shadow Regigigas? - Gamepur

Shadow Pokemon Models Reportedly Discovered In Pokemon GO – NintendoSoup

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How to defeat Shadow Lugia in Pokemon Go: Best counters & weaknesses - Dexerto

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