Fire dimension
The Fire dimension was a pocket dimension that Megatron created using the power of Unicron. It is essentially a portion of his internal universe, but bathed in fire and resembling the inside of a volcano. It was also referred to as Megatron's dimension.
Japanese name: Fire Space
Cybertron
Optimus Prime pursued Megatron and fought him to a standstill. Optimus was able to win back the Omega Lock and escape the fire dimension. As Megatron began to emerge in pursuit, the Omega Lock and Vector Prime's sword were used to collapse the fire dimension around him, resulting in Megatron's first demise in this series.
Although the fire dimension collapsed, it would be created again by Megatron on Gigantion after his defeat at the hands of Metroplex.
A portion of the fire dimension was then controlled and accessed by Starscream, after losing the battle with Galvatron.

