Arbok
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Arbok shrugs off Fighting-type attacks and can annoy the target with STAB Gunk Shot.

Banette
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Banette covers up Dunsparce's Fighting weakness and can potentially threaten the opponent out.

Vikavolt
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Vikavolt shrugs off Fighting-type attacks and can annoy the target with STAB Thunderbolt.

Pinsir
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Pinsir takes most Fighting-type moves decently well and can threaten the opponent with Close Combat.

Mesprit
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Mesprit forces out Fighting-types due to STAB Psychic. In addition, it can set Stealth Rock, which can be useful for Dunsparce.

Beedrill
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Beedrill takes most Fighting-type attacks decently well, and can screw with the opponent using STAB Poison Jab.