Planet Micro Satellite Penitentiary

The Planet Micro Satellite Penitentiary (マイクロ星の衛星刑務所 Micro-sei no Eisei Keimusho) is an Autobot-run prison complex situated on a rather inhospitable moon circling the planet Micro. It is where the local Autobots bring the worse of the Decepticons they capture; Most of the inmates are Micromasters, but there's also the occasional guzzler. The prisoners are rationed minimally to prevent them from getting very far would they escape the highly secured facility and the fuel they do get is calculated to keep them up and running only to perform risky forced labor, which consists of the generating of energy to be used by the people of Micro.

Fiction

Japanese Generation 1 cartoon continuity

Legends comic

By manipulating the Universal Peace Alliance, the Concurrence got Star Saber unjustly arrested and imprisoned at the Planet Micro Satellite Penitentiary. Sixshot and Daniel Witwicky devised a plan to have Sixshot give himself up to the Autobots, allowing him to infiltrate the prison and break Star Saber out. Bonus Edition Vol. 50

Victory cartoon

The inmates were at work when one of them fell into one of the canals leading to a large basin. Though some of the other prisoners showed concern, no one came to his aid and he was flushed away to his death.

Shortly after, the Breastforce launched an attack on the prison to free their old comrade Guyhawk. Faking a mayday to get close, they flew a shuttle into the connecting tunnel between the prison and Planet Micro Satellite Spaceport 4, sending the former adrift on the moon's lava-covered surface. The Breastforce fought their way past the guards until they were confronted by Star Saber and members of the Rescue Patrol Team, who had been notified of the attack and had reached the prison with the aid of Galaxy Shuttle. Hellbat arranged for the other Breastforce members to fight the Autobots while he'd go find Guyhawk. After freeing the other prisoners so they could assist against the Autobots, Hellbat located Guyhawk and got him to the prison's energy room to recharge. There, they were confronted by Holi and Guyhawk's old pal Greatshot. Upon learning that Greatshot now fought for the Autobot cause, Guyhawk engaged him in battle.

Outside, the Autobots were barely able to hold out against the Decepticons, not so much because they being outnumbered, but because Star Saber believed that the prisoners were being manipulated and therefore forbade his troops from going lethal on them. Fortunately for the Autobots, Guyhawk's and Greatshot's fight in the energy room was an even worse decision, as the explosions caused by them damaged the prison badly. As the facility began to sink, lava blasted its way through its structure, possibly killing a number of guards and prisoners. The Autobots refocussed their efforts into getting everyone safe aboard Galaxy Shuttle, whereas the Breastforce took off on their own with the aid of the team's jetformers.

From spaceport 4, the Autobots looked on as the prison slowly vanished beneath the lava and then exploded. Rescue! Guyhawk

The AllSpark Almanac

In the Primax 388.0 Gamma universe, after Micro became Zone, the personality components of the renegade Autobots Screechwing, Spiketail, Nightprowler, Albitron, and Leatherhide were stored there. Ulchtar from another universe sneaked into the Penitentiary and stole the five personality components to form the Combatibots. The AllSpark Almanac II

War for Cybertron triology marketing material

The maximum security prison on the magma covered moon of Micron was one of the planet's hazards identified by Teletraan I. Micron Micromasters marketing material