You just walked out of Mt. Moon with a moon stone in your pocket and a Nidorino that’s itching to evolve. You press use. The music swells. Suddenly, you have a spiky, purple powerhouse sitting at level 16, and you feel like you’ve basically cheated the game.
Honestly? You kinda have.
Nidoking is a monster in Pokémon FireRed. He’s the swiss-army knife of Kanto. But here’s the thing: most players slap Strength and Double Kick on him and wonder why he falls off by the time they hit the Elite Four. If you want a nidoking moveset fire red build that actually shreds, you have to stop thinking about him as just a physical attacker.
He’s a wizard in a bodybuilder's body.
The "Mixed King" Strategy
If you look at Nidoking’s base stats, his Attack is 92 and his Special Attack is 85. On paper, you’d think, "Okay, he’s a physical guy."
Wrong.
In Generation 3, types are what determine if a move is physical or special. Ground and Poison are physical. Ice, Electric, and Fire are special. Because Nidoking can learn basically every TM in existence, his 85 Special Attack is actually more useful than his 92 Attack because it lets him hit for 4x weakness on the toughest bosses.
The "BoltBeam" setup
This is the gold standard. If you aren't running Thunderbolt and Ice Beam, you’re missing out.
- Thunderbolt: You buy this at the Celadon Game Corner. It deletes Lorelei’s water types and Blue’s Pidgeot or Gyarados.
- Ice Beam: Also from the Game Corner. This is the "Delete Button" for Lance’s Dragonites.
I’ve seen people argue that Nidoking doesn't have the "juice" to OHKO with these moves. Sure, he isn't Alakazam. But when you’re hitting a 4x weakness, it doesn't matter. He gets the job done.
Physical STAB is Mandatory
You can’t just go full special. You need that Ground-type STAB (Same Type Attack Bonus).
Earthquake is the king here. You get the TM from Giovanni after the eighth gym. It is non-negotiable. Until you get it, you’ll probably be stuck with Dig. Dig is... fine. It’s annoying because it takes two turns, and if a wild Diglett hits you with Magnitude while you’re underground, you’re taking double damage.
Switch to Earthquake the second you get it.
What about Poison moves? Honestly, Poison is garbage in FireRed. It’s only super effective against Grass types, and you have Ice Beam or Flamethrower for that. Sludge Bomb is a great move, but you don't even get the TM until the post-game on the Sevii Islands.
Basically, ignore Poison moves for the main story.
The Megahorn Factor
At level 43, Nidoking learns Megahorn. This is a Bug-type move with 120 base power. It’s physical.
It’s also your only real answer to Alakazam and Exeggutor. Psychic types are the bane of Nidoking’s existence because of his Poison typing. If you’re slower than an Alakazam, you're probably getting one-shot by Psychic. Megahorn gives you a nuclear option to hit back if you manage to survive a hit or switch in on a predicted move.
The accuracy is 85%, which means it will miss at the worst possible moment. That's just Pokémon.
Choosing the Right Nature
If you’re a casual player, don't sweat this too much. But if you’re trying to optimize, the nature makes a massive difference for a mixed attacker.
- Rash or Mild: These boost Special Attack while lowering a defense. Since Nidoking isn't a tank anyway, this is usually the best play.
- Naughty or Lonely: These boost Attack. Good if you want your Earthquake to really hurt.
- Adamant: DO NOT DO THIS. It boosts Attack but kills your Special Attack. An Adamant Nidoking makes your Thunderbolt and Ice Beam hit like wet noodles.
The Best In-Game Moveset (The Final Four Build)
If you want to walk into the Pokémon League and feel like a god, this is the kit:
- Earthquake: Your primary nuke.
- Ice Beam: For the Dragons and Grass types.
- Thunderbolt: For the Birds and the Sea.
- Megahorn / Thrash / Rock Slide: Use the fourth slot for whatever your team is missing.
Rock Slide is actually a hidden gem. You can get it from a Move Tutor in Rock Tunnel. It’s great for Charizard or Moltres if you didn't pick the Water starter.
Speedrunning vs. Casual Play
In speedruns, Nidoking is the GOAT (Greatest of All Time). Runners use Thrash early on because it just mows down everything through the mid-game.
For a regular playthrough, Thrash is risky. Being locked into a move for 2-3 turns and then getting confused is a recipe for a "fainted" screen when you’re fighting a trainer with a diverse team. Stick to the TMs.
Also, a quick tip for the early game: Keep Double Kick.
You’ll get it as a Nidoran at level 12. It’s the only reason you’ll beat Brock if you chose Charmander. Don't delete it until you get Dig or Secret Power later on.
Realities of the Grind
Nidoking is in the "Medium Slow" growth group. This means he needs a lot of XP to level up. If you try to run a full team of six, he might end up underleveled, which makes his "jack of all trades" stats feel underwhelming.
I usually recommend running him in a smaller team—maybe four Pokémon total. This ensures he stays ahead of the level curve. A Nidoking that is five levels higher than the opponent can solo almost the entire game.
Where to get the TMs
- TM 26 (Earthquake): Viridian Gym (Giovanni).
- TM 13 (Ice Beam): Celadon Prize Room (4,000 coins).
- TM 24 (Thunderbolt): Celadon Prize Room (4,000 coins).
- TM 35 (Flamethrower): Celadon Prize Room (4,000 coins).
Yes, you’re going to spend a lot of time at the Slots. Or, if you’re like me, you’ll just grind the Vs. Seeker for money and buy the coins directly. It’s faster.
Final Actionable Steps
To get the most out of your Nidoking, follow this timeline:
- Route 22: Catch Nidoran♂ immediately.
- Level 12: Learn Double Kick. Now you can beat Brock.
- Mt. Moon: Find the Moon Stone and evolve to Nidoking immediately. There is no benefit to waiting.
- Cerulean City: Find the Dig TM behind the robbed house. This is your main move for the next three gyms.
- Celadon City: Buy Ice Beam. This changes your life.
- Post-Eighth Gym: Replace Dig with Earthquake.
Nidoking isn't just a cool-looking rhino. He's the most versatile tool in FireRed. Give him the right TMs, stop relying on Poison moves, and he’ll carry you all the way to the Hall of Fame.