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Destroying you here will accelerate my schedule. Next I will restore the Hard Boiled Heavies as my generals. My Badnik forces will conquer the world. I Will rule as it’s metallic overlord.

— Heavy King, Sonic the Hedgehog 30th Anniversary Special

The Heavy King[1] (ヘビーキング[2] Hebī Kingu?) is a character that appears in the Sonic the Hedgehog series. The leader of the Hard Boiled Heavies, the Heavy King is an enhanced version of an Eggrobo created by Dr. Eggman. Struck with the power of the Phantom Ruby, the Heavy King led his troop into battle against the likes of Sonic and his friends.



Originally an Eggrobo, the Heavy King only received a makeover when he stumbled upon the Phantom Ruby. Decorated as a mixture between a king and a knight, the Heavy King has a red cape, signifying his rank among the other Hard Boiled Heavies as the leader. His appearance seems to be based of both Classic and Modern Eggman, having a cape similar to Classic Eggman's, but having a chest plate resembling the jacket of Modern Eggman's. The Heavy King has spiked knee joints and triangular shoulder pads along with red boots with golden forefeet. He also has bronze-colored armor-plating on his chest with a white crown symbol. He also has gray appendages and red eyes.



Sonic Mania[]


The Heavy King with his elite troop in Green Hill Zone shortly after transforming.

The Heavy King was originally an elite Eggrobo who handled the most extreme tasks for his creator, Dr. Eggman.[3] After detecting a mysterious energy source on Angel Island, Eggman sent the Heavy King and his Hard Boiled Heavies to investigate.[4] Upon reaching Angel Island, he and his troop excavated the energy source, the Phantom Ruby, just as Sonic the Hedgehog and Miles "Tails" Prower arrived. The Phantom Ruby promptly warped space-time around them,[4] transforming the Heavy King into his royal-esque attire along with his troop. As a side effect of the ruby, the Heavy King and his team gained free wills and personalities of their own, though they were driven mad in the process.[1]

Hard Boiled Heavies Green Hill Act 2

Eggman attempting to command the Heavy King and the Hard Boiled Heavies.

The Phantom Ruby transported the Hard Boiled Heavies, along with Sonic, Tails, and a nearby Knuckles the Echidna, to the Green Hill Zone, where the troop fled with the gemstone. After that, the Hard Boiled Heavies planned to keep the Phantom Ruby for themselves. The Heavy King and his troop soon met Eggman again though, who tried to command the group. When they would not listen though, Eggman snatched the Phantom Ruby from their clutches. The Heavy King and his troop then fled the scene.

Some time after, while the Heavy Rider was preoccupying Sonic and Tails in Lava Reef Zone, the Heavy King took this chance to steal the Master Emerald, but not before Knuckles could arrive. Knuckles proceeded to attack Heavy King before he could successfully steal the gem. Even when using the power of the Master Emerald to fight the echidna, the Heavy King was still defeated by Knuckles, who smashed his scepter, and retreated.

Egg Reverie Heavy King vs Eggman

The Phantom King and Eggman fighting over the Phantom Ruby.

When Sonic and Eggman were sent to Egg Reverie Zone with the Phantom Ruby, a powered-up incarnation of the Heavy King known as the Phantom King arrived on the scene where he swiped the Phantom Ruby and used it to power himself. However, the Phantom King met resistance when Eggman (with the Klepto Mobile) and Super Sonic fought him separately for ownership of the Phantom Ruby. At the end of the conflict, the Heavy King was seemingly destroyed by Super Sonic.

Sonic Mania Plus[]


The Heavy Magician giving the Phantom Ruby to the remains of the Hard Boiled Heavies.

In Sonic Mania Plus, the Heavy King (still in his Phantom King form) had been destroyed after the events in the Egg Reverie Zone, his remains having been left on Angel Island with most of the other Phantom Heavies. However, after Sonic's return with the Phantom Ruby following the War to Take Back the Planet, the Heavy Magician was able to steal the Phantom Ruby and give it to the Phantom King, who used it to revive himself and the rest of the Hard Boiled Heavies, just as Sonic and his companion caught up to them. The group's resurrection also triggered a warp that sent them all to Green Hill Zone. There, the Heavy King and the Hard Boiled Heavies fled with the Phantom Ruby in hand. When they regrouped, the group thought they could keep the Phantom Ruby to themselves. However, Eggman showed up again and took the ruby when they would not obey him, leaving the Heavy King and his troop to flee the scene.

Not long after, the Heavy King tried to steal the Master Emerald again. However, his attempt was thwarted by Sonic, Tails, Knuckles, Mighty and Ray. In an attempt to seize victory, the Heavy King harnessed the Master Emerald's power. However, he was still defeated and retreated after his scepter got shattered.

After stopping Eggman's usage of the Phantom Ruby, which was seemingly lost after their battle, Sonic and co. went to an ice cream parlor. There, the Heavy King surprised Sonic and friends with a giant sundae.

IDW Publishing[]

Seasons of Chaos[]

Heavy King with the seven Chaos Emeralds, from Sonic the Hedgehog 30th Anniversary Special.

Heavy King remotely oversaw the progress of his Badniks toward their retrieval of the Chaos Emeralds through Tails Doll, and was pleased when both Metal Sonic and Metal Knuckles delivered the green and blue Chaos Emeralds to him, which he placed into sockets on his stage. A short while later, Metal Sonic and Metal Knuckles returned to Heavy King with the remaining Chaos Emeralds, which he also placed into the sockets on his stage, and used them to empower himself. However, he soon met resistance from Sonic, Tails, Knuckles, Amy, Mighty, Ray, Fang, Bark, Bean, and Eggman, as well as Metal Sonic and Metal Knuckles, both of whom Eggman had regained control over. Despite their efforts though, Heavy King managed to hold them back with the power of the Chaos Emeralds that he channled into energy attacks, stating his desire to rule the world with the Hard Boiled Heavies as his generals. The group continued to fight Heavy King, to no avail, prompting Sonic to formulate a plan to distract Heavy King while the others grabbed the Emeralds. Despite overhearing said plan, Heavy King fell for it due to his sheer pride and arrogance. With him no longer possessing the energy of the Emeralds, Sonic defeated the Heavy King with a powerful Spin Dash. Defeated, Heavy King pled for mercy to Eggman, who granted him another chance, on the condition that he would receive a software patch to prevent him overthrowing him again. Heavy King accepted, and grudgingly informed Eggman of the heroes' escape from the fortress, the majority of his Badnik army had being destroyed, and Metal Sonic and Metal Knuckles' lack of power, leaving Eggman with no means of retrieving the Chaos Emeralds. Annoyed, Eggman asked Heavy King to make him a grilled cheese sandwich, to which Heavy King replied "Apologies, sir. I am Heavy King. Not Heavy Chef".[5]

Dr. Eggman's Birthday[]

Heavy King in a meeting with Eggman, from Sonic the Hedgehog 30th Anniversary Special.

In honor of Dr. Eggman's birthday, Heavy King, along with several other Badniks, launched an attack against Sonic the Hedgehog, only to be called off by Dr. Eggman himself, who ordered Heavy King and the other Badniks to return to his base. There, he lectured them about how they were unprepared to fight Sonic. Despite Heavy King feeling ashamed for his involvement in the attempted assault, he and the other Badniks still wished Dr. Eggman a happy birthday when Heavy King had the cake brought out.[6]

Fang the Hunter miniseries[]

The Hard Boiled Heavies were task by Dr. Eggman to test fly the Heavy Wing, but after finding the Warp Topaz they went by their own agenda. Once Heavy King discovered Fang’s Gang had came to stop them he ordered the others to chase them down leaving Heavy King to fight Bark. Heavy King would say how he respect Bark and how he can fight like robot but Fang and Bean stop him while Sonic and Tails crash the ship into the water leaving the Hard-Boiled Heavies to come back to base.[7] [8]


The leader of the Hard Boiled Heavies. Commands his elite troop with a watchful eye and a powerful scepter.

Description, Sonic Mania manual[1]

Compared to the other Hard Boiled Heavies, the Heavy King gives off the impression of a brooding, stone-cold authority figure, completely opposite compared to the flamboyant members of his troop. Strict and serious, he rules his troop with an iron fist. With just one look, he is able to command his troop, as seen when the Heavy Gunner immediately followed orders with just one glare from him. He keeps a watchful eye on his colleagues,[1] implying he is extremely alert of a situation. Like the other Hard Boiled Heavies, he wishes to do harm to Sonic, Tails, and Knuckles whether it be by orders from Eggman or by his own chaotic nature.

Powers and abilities[]

The Heavy King displays a sheer level of authority, commanding his troops with just a simple glare. He is also much more durable than the average Eggrobo. The Heavy King also has the ability to absorb and manipulate energy, as shown during his battle with Knuckles where he would absorb energy from the Master Emerald and then channel it into his scepter to enhance its energy attacks. While he is charge with the Master Emerald’s energy, he is also able to freely float through the air.


The Heavy King possessed a powerful scepter[1] that could fire purple lasers and conjure up spheres of powerful energy which the Heavy King could control telekinetically. When the scepter was powered up with energy provided from the Master Emerald, its laser could cause explosions and its energy spheres could be arranged into a shield. However, the scepter was broken during the Heavy King's fight with Knuckles.


Phantom King[]

Main article: Phantom King
Heavy King super state

The Phantom King, from Sonic Mania.

Through unknown means, the Heavy King can assume a more powerful state called the Phantom King.[9] In this form, he gains a massive power boost when harnessing the power of the Phantom Ruby, enough to bypass a Super State user's invulnerability with his most powerful attacks. The powers he command in this form includes flight, increased strength, and energy manipulation that does not rely on his base form's scepter.


Dr. Eggman[]

Dr. Eggman is Heavy Kings creator and deeply respects him and will do what he is told. But one incident Heavy King took full control of his robots and kicked him out of his own base Eggman had to team up with Sonic and friends to stop him but soon after he went right back to helping the doctor proving his loyalty.[10] Heavy King and the badniks even tried to have him a birthday party proving he cares for his creator.[11] Later on, in another incident Heavy King lied to Eggman about what is causing the disappearing and quick relocating of the Heavy Wing. Eggman would hire Fang's Gang to find out and once the heavy wing was destroyed by Sonic and Tails Eggman left Heavy King in the ocean to return to base while Eggman moved forward.[12][13]

Hard Boiled Heavies[]

Heavy King is the smartest and the leader of the Hard Boiled Heavies and if told a task by King, they will do it with no second thought showing a sense of power towards the others. Heavy King also directed them during the first bout with sonic and friends. Heavy King is also known to be the stronger than the others which he also shows good leadership skills being able to manage thigs Eggman cane. When they fail a task Heavy King won't be upset with them showing he does care about their well-being.[13]

Bark the Polar Bear[]

Bark Vs Heavy King

Bark the Polar Bear fighting Heavy king from, Sonic the Hedgehog: Fang the Hunter Issue 4.

While Heavy King was fighting Bark the Polar Bear on the Heavy Wing while Fang's Gang was close to rapping up their recent adventure He sees him as a worthy opponent even saying how he fights similar to a robot and has manage to gain the respect of Heavy King.[13] This also says that Bark and Knuckles are the only people who could go head to head with Heavy King in combat as Sonic needed his super form to defeat him




The Heavy King is one of the two final bosses for Lava Reef Zone (the other being the Heavy Rider) and the twentieth overall boss of Sonic Mania and Sonic Mania Plus.

In Sonic Mania, the Heavy King is fought with Knuckles at the end of his version of Lava Reef Zone Act 2. In Sonic Mania Plus, he is fought with Knuckles at the end of his version of Lava Reef Zone Act 2 in Mania Mode, and with Sonic, Tails, Knuckles, Mighty or Ray at the end of Lava Reef Zone Act 2 in Encore Mode (if the right path is taken).

Boss guide[]

This boss battle will be initiated after the playable character stops the Heavy King's theft of the Master Emerald. The battle itself takes place in the Master Emerald's altar, whose large Emeralds act as platforms. When the battle begins, the Heavy King will attempt to utilize the power of the Master Emerald, similar to Mecha Sonic Mk. II from Sonic 3 & Knuckles. He does so by periodically jumping onto the Master Emerald and absorbing some power from it. He will then hover around the shrine while utilizing one of three attacks:

  • Beams: The Heavy King fires two purple beams across the floor with his scepter. These lasers will emit shockwaves on the floor in their aftermaths that will damage the player upon contact. These beams can be avoided though by standing on top of the Super Emerald replicas, or the Master Emerald.
  • Spheres: The Heavy King creates a shield of spheres around himself that will block Knuckles' attacks. He then proceeds to bounce around the shrine while firing his spheres directly at Knuckles. This attack is best avoided by staying on the move.
  • Bullets: The Heavy King fires a barrage of bullets around the shrine. The Super Emerald replicates can be used as covers for this attack however. Occasionally, the Heavy King may use this attack directly after his beam attack.

After launching his attack(s), the Heavy King will fall to the ground, retreat to the Master Emerald and repeat his attack pattern. It is during this period that he will be most vulnerable to attacks. He can also be attacked while he is hovering in the air after charging energy. Hit the Heavy King eight times and he will admit defeat and flee. The player can then proceed to the Capsule and finish the Zone.


Name Artist(s) Length Music track
"Havoc Prognosis - Eggman Boss 2" Tee Lopes 1:35



Sonic Mania Boss 22 - Heavy King


  • The Heavy King makes a cameo within Mirage Saloon Zone Act 2 in the form of a painting. The Heavy King's eyes on this painting will stare at the player's current position until they leave the area.
  • Despite having red eyes, the Heavy King's silhouette in the opening animation for Sonic Mania depicts him with yellow-glowing eyes instead of red.
  • The Heavy King is the only member of the Hard Boiled Heavies who does not use "Hi-Spec Robo Go!" as his boss theme like the others, instead sharing "Havoc Prognosis" with the Weather Globe in Studiopolis Zone and Gachapandora in Metallic Madness Zone.
  • If Knuckles is Super Knuckles during the cutscene with the Heavy King in Hidden Palace Zone, he will glow the same Super Knuckles colors in the flashback he has of himself and Eggman there too.
    • This is likely due to the sprites possessing the same color palette, resulting in the same animation.


  1. 1.0 1.1 1.2 1.3 1.4 1.5 Sonic Mania English instruction manual, "Characters.
  2. Sonic Mania Japanese instruction manual.
  3. Sega. "Story So Far". Sonic Mania Introduction Manual. Sega. p. 1. "Some time after saving Angel Island, Sonic the Hedgehog and his best friend, Miles "Tails" Prower, are relaxing when Tails picks up a strange energy reading far away. Though different from the Chaos Emeralds, the reading is remarkably powerful, and Tails convinces Sonic to join him to check it out. Sonic and Tails take off on the Tornado towards the source, but sure enough, the evil Dr. Eggman has detected it too! Now it's a race between Sonic and Eggman to get there first and figure out what mysteries it holds. However, Eggman has been busy: he's just unleashed a new team of elite Egg-Robos to handle his most important tasks. They're called the "Hard-Boiled Heavies," and they're about to reach the source of the signal first! It's up to Sonic, Tails, & their newest ally, Knuckles the Echidna, to defeat the Hard-Boiled Heavies, unlock the secrets of the energy source, and stop Dr. Eggman!"
  4. 4.0 4.1 Sonic Mania English instruction manual.
  5. Sonic the Hedgehog 30th Anniversary Special, "Seasons of Chaos"
  6. Sonic the Hedgehog 30th Anniversary Special, "Dr. Eggman's Birthday"
  7. Sonic the Hedgehog: Fang the Hunter Issue 3
  8. Sonic the Hedgehog: Fang the Hunter Issue 4
  9. Live Sonic Mania Developer Playthrough (5:49:13). Stealth (20 August 2017). Retrieved on 22 August 2017.
  10. Sonic the Hedgehog 30th Anniversary Special, "Seasons of Chaos"
  11. Sonic the Hedgehog 30th Anniversary Special, "Dr. Eggman's Birthday"
  12. Sonic the Hedgehog: Fang the Hunter Issue 3
  13. 13.0 13.1 13.2 Sonic the Hedgehog: Fang the Hunter Issue 4

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