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Charjabug is the only Electric pokemon in the entire game that can evolve and have the paralysis status effect. This is because Grubbin is pure Bug type so you can paralyze it right before it evolves, making Charjabug the only Electric type that can be paralyzed ever since the mechanic change in Gen 6. This is unique to the Grubbin line since it's also the only pokemon that evolves and gains the Electric type.
You could also do a similar thing with Pom pom Oricorio, but that's just a form change.
