Sure I guess it could have a niche offensive use against gym clefairies. But otherwise there's no real reason to use Nidoking in this meta
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He is a solid defender, as he isn't double weak to water. On offense you could quick TM him to get double poison, but currently there is little need for a poison type. If you need a poison type, Muk is easy enough to get now.
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Yeah I have several Muks so I think I'll stick him in gyms for now then