Wisdom of Sea and Sky

Stage 2

{Darkness}{Darkness}{Colorless} Poison Horn 90
Your opponent's Active Pokémon is now Poisoned.

Weakness {Fighting} +20

Retreat {Colorless}{Colorless}{Colorless}

Nidoking

Destined Rivals

Stage 2 ex

{Darkness}{Darkness}{Colorless} Tainted Horn 100
Your opponent's Active Pokémon is now Poisoned. During Pokémon Checkup, put 8 damage counters on that Pokémon instead of 1.
{Darkness}{Darkness}{Darkness}{Colorless} Kingly Impact 240

Weakness {Fighting} ×2

Retreat {Colorless}{Colorless}{Colorless}

Team Rocket's Nidoking ex

Genetic Apex

Ability Enthusiastic King
If you have Nidoqueen in play, ignore all Energy in the costs of attacks used by this Pokémon.

{Darkness}{Darkness}{Colorless}{Colorless} Venomous Impact 190
Your opponent's Active Pokémon is now Poisoned.

Weakness {Fighting} ×2

Retreat {Colorless}{Colorless}{Colorless}

SVP Black Star Promos

{Darkness}{Darkness}{Colorless} Tainted Horn 100
Your opponent's Active Pokémon is now Poisoned. During Pokémon Checkup, put 8 damage counters on that Pokémon instead of 1.
{Darkness}{Darkness}{Darkness}{Colorless} Kingly Impact 240

Weakness {Fighting} x2

Retreat {Colorless}{Colorless}{Colorless}

Team Up

{Colorless}{Colorless} Drag Off
Switch 1 of your opponent’s Benched Pokémon with their Active Pokémon. This attack does 50 damage to the new Active Pokémon.
{Psychic}{Colorless}{Colorless} King’s Drum 100+
If Nidoqueen is on your Bench, this attack does 100 more damage.

Weakness {Psychic} ×2

Retreat {Colorless}{Colorless}{Colorless}

Evolutions

{Psychic}{Colorless} Rumble 40
The Defending Pokémon can't retreat during your opponent's next turn.
{Psychic}{Psychic}{Colorless} Tail Swing 100
This attack does 20 damage to each of your opponent's Benched Basic Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Weakness {Psychic} ×2

Retreat {Colorless}{Colorless}{Colorless}

BREAK

{Psychic}{Psychic}{Colorless} Toxic Drill 120
Your opponent's Active Pokémon is now Poisoned. Put 2 damage counters instead of 1 on that Pokémon between turns.

Nidoking BREAK

Steam Siege

Ability King's Palace
Your Nidoqueen's attacks do 20 more damage to your opponent's Active Pokémon (before applying Weakness and Resistance).

{Psychic}{Psychic}{Colorless} Power Lariat 60+
This attack does 30 more damage for each Evolution Pokémon on your Bench.

Weakness {Psychic} ×2

Retreat {Colorless}{Colorless}{Colorless}{Colorless}

Plasma Freeze

{Colorless}{Colorless} Lovestrike 20
Does 40 more damage for each Nidoqueen on your Bench.
{Fighting}{Colorless}{Colorless}{Colorless} Horn Drill 90

Weakness {Water} ×2

Resistance {Lightning} -20

Retreat {Colorless}{Colorless}{Colorless}

Triumphant

Poke-BODY Pheromone Stamina
Nidoking gets +20 HP for each Nidoqueen you have in play.

{Fighting}{Fighting}{Colorless}{Colorless} Venomous Horn 80
The Defending Pokémon is now Poisoned.

Weakness {Water} ×2

Resistance {Lightning} -20

Retreat {Colorless}{Colorless}{Colorless}

Rising Rivals

Poke-BODY Territoriality
If your Active Pokémon is damaged by an opponent's attack (even if that Pokémon is Knocked Out), put 2 damage counters on the Attacking Pokémon. You can't put more than 2 damage counters in this way.

{Colorless}{Colorless}{Colorless} Fling Away 60
If your opponent has any Benched Pokémon, this attack's base damage is 30 instead of 60 and this attack does 30 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
{Fighting}{Colorless}{Colorless}{Colorless} Giga Horn 100
Flip 2 coins. If both of them are tails, this attack does nothing.

Weakness {Water} +30

Resistance {Lightning} -20

Retreat {Colorless}{Colorless}

Secret Wonders

{Colorless}{Colorless} Poison Rub 20
The Defending Pokémon is now Poisoned. Before doing damage, you may switch 1 of the Defending Pokémon with 1 of your opponent's Benched Pokémon. The new Defending Pokémon is now Poisoned.
{Psychic}{Psychic}{Colorless}{Colorless} Pride Attack 60+
Flip a coin for each Nidoqueen on your Bench. This attack does 60 damage plus 30 more damage for each heads.

Weakness {Psychic} +30

Retreat {Colorless}{Colorless}

Dragon Frontiers

{Colorless}{Colorless} Linear Attack
Choose 1 of your opponent's Pokémon. This attack does 30 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
{Darkness}{Colorless}{Colorless} Dark Horn 60
You may discard a Basic Pokémon or Evolution card from your hand. If you do, choose 1 of your opponent's Benched Pokémon and do 20 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Weakness {Psychic} ×2

Retreat {Colorless}{Colorless}{Colorless}

Nidoking δ

FireRed & LeafGreen

Poke-BODY Power Gene
As long as Nidoking is in play, your attacks by Nidoran ♀, Nidorina, Nidoqueen, Nidoran ♂, and Nidorino do 10 more damage to the Defending Pokemon.

{Fighting}{Colorless} Earth Poison 40
If the Defending Pokémon already has any damage counters on it, the Defending Pokémon is now Poisoned.
{Fighting}{Fighting}{Colorless}{Colorless} Bound Crush
Choose 1 of your opponent's Pokémon. This attack does 60 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Nidoking can't use Bound Crush during your next turn.

Weakness {Water} ×2

Retreat {Colorless}{Colorless}{Colorless}

Aquapolis

Poke-POWER Earth Rage
Once during your turn (before your attack), if Nidoking is your Active Pokémon, you may flip a coin. If heads, put a damage counter on each of your opponent's Benched Pokémon. This power can't be used if Nidoking is affected by a Special Condition.

{Fighting}{Fighting}{Colorless}{Colorless} Giant Horn 50+
Flip a coin. If heads, this attack does 50 damage plus 30 more damage.

Weakness {Grass} x2

Resistance {Lightning} -30

Retreat {Colorless}{Colorless}{Colorless}

Poke-BODY Crystal Type
Whenever you attach a Grass, Lightning, or Fire basic Energy card from your hand to Nidoking, Nidoking's type (color) becomes the same as that Energy card type until the end of the turn.

{Grass}{Grass}{Colorless} Poison Horn 20
The Defending Pokémon is now Poisoned.
{Lightning}{Lightning}{Fighting}{Fighting} Rolling Thunder 50
Flip a coin, If heads, this attack does 10 damage to each of your opponent's Benched Pokémon. If tails, this attack does 10 damage to each of your Benched Pokémon. (Don't apply Weakness or Resistance for Benched Pokémon.)

Weakness {Grass} x2

Retreat {Colorless}{Colorless}{Colorless}

Legendary Collection

{Grass}{Colorless}{Colorless} Thrash 30+
Flip a coin. If heads, this attack does 30 damage plus 10 more damage; if tails, this attack does 30 damage and Nidoking does 10 damage to itself.
{Grass}{Grass}{Grass} Toxic 20
The Defending Pokémon is now Poisoned. It now takes 20 Poison damage instead of 10 after each player's turn (even if it was already Poisoned).

Weakness {Psychic} ×2

Retreat {Colorless}{Colorless}{Colorless}

Gym Challenge

{Grass} Intimidate
If the Defending Pokémon's maximum HP is 50 or less, it can't attack Giovanni's Nidoking during your opponent's next turn. (Benching or evolving either Pokémon ends this effect.)
{Grass}{Grass}{Grass}{Colorless} Tumbling Attack 40+
Flip a coin. If heads, this attack does 40 damage plus 30 more damage; if tails, this attack does 40 damage.

Weakness {Psychic} x2

Retreat {Colorless}{Colorless}{Colorless}

Giovanni's Nidoking

Base Set 2

{Grass}{Colorless}{Colorless} Thrash 30
Flip a coin. If heads, this attack does 30 damage plus 10 more damage; if tails, this attack does 30 damage and Nidoking does 10 damage to itself.
{Grass}{Grass}{Grass} Toxic 40
The Defending Pokémon is now Poisoned. It now takes 20 Poison damage instead of 10 after each player's turn (even if it was already Poisoned).

Weakness {Psychic} ×2

Retreat {Colorless}{Colorless}{Colorless}