Solitarium
- Solitarium is a substance from the Robot Masters portion of the Generation 1 continuity family.

Solitarium is a type of magic rock. It was sought by the Transformers so it could do magic things and then be forgotten.
Fiction
Robot Masters
Solitarium was littered all around Earth, with no explanation of what it was or where it came from. One thing was clear, and that was that the Decepticons wanted their hands on it.
Pack-in comic
Gigant Bomb installed a chunk of Solitarium in his chest, vastly increasing his power to the point where even Optimus Prime and Optimus Primal couldn't scratch him. However, Victory Saber soon arrived and sliced the piece of Solitarium in two, forcing the Decepticon to retreat. The Victory Warriors Enter!!
Online comic
Starscream created four melee weapons from pure Solitarium, which he then fashioned into the Arsenal Force. Robot Masters
Cartoon
A large deposit of Solitarium was discovered beneath New York City, and as a result, the city came under attack by the Decepticons. When Prime and Primal's "Double Prime Tornado" met with Beast Megatron and Rebirth Megatron's "Double Megatron Tornado", the energy produced by the attacks reacted with the Solitarium and caused it to flood out all over the city's streets. The Lio Convoy Typhoon Enters
Timelines
Solitarium is a controlled substance in the city of Axiom Nexus. When he apprehended Jackpot, Stungun accused the Action Master of being on the energy in addition to Nucleon. Gone Too Far
Transformers Animated
Optimus Prime wields a Solitarium ultra-axe. The AllSpark Almanac
Toys
Robot Masters
Most toys in the Robot Masters line came with a new accessory. Six of these were explicitly forged from Solitarium...
- RM-04 Wrecker Hook's "Boost Hammer"
- RM-06 Air Hunter's "Sacred-Cut Sword 'Armorkiller'"
- RM-08 Wingstun's "Jamming Trident"
- RM-09 Psycho-Orb's "Calamity Defenser"
- RM-13 Smokesniper's "Radial Pod"
- RM-14 Gigant Bomb's "Pulverizer"
The Hammer, Sword, Trident and Defenser could be combined to form the Arsenal Force megaweapon. Though it is not explicitly shown, the Pod and Pulverizer can also be added to the mix.
100 sets of special clear-red versions of these four weapons were made available as a contest prize (along with red versions of the three Autobot guns), as second place in the same contest where Cybertron Base was first prize.
Each of the mail-away "Limited Black Version" Robot Masters toys came with a chrome-gold version of one of the four Arsenal Force weapons.
- RM-01 Optimus Prime - Gold Calamity Defenser
- RM-02 Megatron - Gold Sacred-Cut Sword "Armorkiller"
- RM-11 Optimus Primal - Gold Boost Hammer
- RM-12 Starscream - Gold Jamming Trident
There are other new accessories in Robot Masters that are not explicitly Solitarium weapons. The nameless missile launcher included with Optimus Prime, Megatron, and Optimus Primal (and their redecoes) could be considered a Solitarium weapon.
Additionally, the extra chromed weapons from the first Robot Masters Autobots are the same transparent plastic as the Solitarium weapons underneath the chrome coat. These were included in the contest-prize weapon set in clear-red without the chrome coating, so perhaps those versions are forged from Solitarium.
- RM-03 Mirage's "JS Laser Gun"
- RM-05 R-Blade's "Flare Gun"
- RM-07 Bound Rogue's "Type 93"
Notes
- It has been speculated that the new-mold weapons in Robot Masters are actually unused accessories from the Takara "LED Powers" Microman series, which was abruptly cancelled in late 2000. The last section of the line included transparent plastic weapons that could be combined to form armor or larger weapons for the individual Microman figures. The handle size is also identical between the Solitarium parts and the "Shining Tector" Microman weapons.


