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This object exists primarily within the Sonic Boom continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Quotation1 Ragnium! My ultimate weapon. Power to fuel my revenge. Revenge against Sonic! Quotation2
Dr. Eggman, Sonic Boom: Fire & Ice

Ragnium is a substance that appears in Sonic Boom: Fire & Ice. It is a rare mineral which is highly suitable as robot fuel. It was discovered and harnessed by Dr. Eggman for a revenge scheme against Sonic.


Ragnium is a supercharged element that resembles green crystals. A naturally-occurring substance, the only known deposits of it are found underground on the island of Ragna Rock. When melted down and combusted, it can be used as a powerful fuel source for robots,[1][2] granting them increased speed and agility.

Ragnium and its waste products appear to create potent energies with elemental affinities known as Fire and Ice energy.[3] These energies can be harnessed by both robots and organic creatures to trigger Fire Mode and Ice Mode, abilities that let the users superheat or freeze objects in an instant. Additionally, Ragnium emits a traceable radiation.



Sonic Boom: Fire & Ice


Eggman mining for Ragnium on Ragna Rock.

Discovered by Dr. Eggman, the doctor would mine Ragnium from Ragna Rock as a fuel for his EggBot Racers for a plan to discredit his rival Sonic; if his Ragnium-fueled robots could allegedly outrun Sonic, the hedgehog's reputation as the fastest thing alive would be ruined. Meanwhile, Eggman would pipe off the by-products of his operation to adjacent islands, creating Ragnium-infused fissures that damaged the environment. To mine Ragnium, Eggman created the robot D-Fekt, although it did not live up to its intended purpose.[1][2]

During Team Sonic's climactic battle with D-Fekt on Ragna Rock, D-Fekt ruined Eggman's Ragnium mine when building himself up, making it impossible to mine for Ragnium on Ragna Rock again.


In gameplay, Ragnium serves as a collectible that can be gained in various ways. Defeating a lesser enemy awards one Ragnium shard, while completing a Dragon Ring challenge in an adventure level gives ten shards. Ragnium can also be earned via StreetPass, or by completing a level within a time limit or with a certain amount of Rings. However, being defeated during a level makes the player lose their Ragnium.

After being collected, Ragnium can be traded with Tails at the Bot Racer Workshop in exchange for new content.[3] It can also be used to unlock exclusive pieces of concept art in Sonic's Shack.[4]



  1. 1.0 1.1 Rignall, Jaz (9 June 2015). What's Next for Sonic the Hedgehog (and friends)?. USGamer. Retrieved on 10 June 2015.
  2. 2.0 2.1 Sega. Sonic Boom: Fire & Ice - Nintendo 3DS. Retrieved on 22 June 2015.
  3. 3.0 3.1 Sanzaru Games (27 September 2016). Sonic Boom: Fire & Ice. Nintendo 3DS. Sega. Level/Area: Snowy Peak. Miles "Tails" Prower: "The Fire and Ice energy these fissures are emitting could have world ending consequences!"
  4. Koopman, Daan (6 September 2016). Sonic Boom: Fire & Ice (3DS) Hands-on Preview. Nintendo World Report. Retrieved on 16 September 2016.