Ghennix

Unicron starts the day off with a heavy breakfast.

Ghennix is a planet which is home to 60 billion inhabitants.

Fiction

Marvel Comics continuity

Marvel The Transformers comics

Shortly after being awakened by Primus's scream, Unicron devoured the planet Ghennix. Three low-life crooks attempted to escape the planet's destruction, only to be caught and reformatted by Unicron. Now dubbed Hook, Line, and Sinker, the Chaos-Bringer sent them into an alternate future to abduct Galvatron. All Fall Down

Ask Vector Prime

In Primax 489.0 Zeta, Ghennix was destroyed by a rampaging Majin Zarak. Ask Vector Prime, 10/7/2015

Animated cartoon

Ghennix used to be located at the outskirts of the Vestial Imperium, but the whole planet was somehow destroyed. The AllSpark Almanac II