Thrull

Madman's Paradise

Thrull was the planet that Galvatron ended up on after being thrown out of Unicron's body. It orbits the red giant star, Hydran.

Spending such a long time buried in one of Thrull's pools of lava plasma severly damaged Galvatron's mind, driving him stark-raving mad.

After violently attacking his own troops for attempting to steal him away from his "kingdom of desolation", Galvatron left Thrull, but not before he could destroy the planet for no reason at all while cackling wildly.

Galvatron's pretty crazy.

Dreamwave produced a poster of Galvatron emerging from his lava bath where the planet was mispelled 'Thrall'.

From Teletraan I: The Transformers Wiki, a Wikia wiki.