Feminia

Feminia is a prosperous planet where the local sapient life forms are human colonists, or Nebulan colonists of Marvel-type race, or... well, the existence of the planet's hexapod vertebrates suggests they're not indigenous, but if you want to try to determine exobiology rationally, you're in the wrong place.

It also doesn't exist anymore until it lives on.

The Transformer (manga)
In 2010, Cybertronians visit Feminia for the first time. The Transformer

The Headmasters
In order to relax Blurr and Arcee's concerns over Hot Rod's mission to Vector Sigma, Kup reminds them of the time that Hot Rod bested Galvatron during a battle on planet Feminia.A Dream is Born, Double Prime

Zone
Many years later, the new Decepticon Emperor of Destruction Violen Jygar sends his Nine Great Demon Generals to Feminia in search of the Zodiac energy source. Since it's not there, they blow the planet apart to show how intimidating they are. The Autobot Supreme Commander Victory Saber rapidly coordinates the evacuation of as many people as he can, including a young boy named Cain, but in the process fails to escape himself and is trapped on the surface when the Decepticon Generals crack the planet like an egg. And that is the end of Feminia.

The AllSpark Almanac
The destroyed Feminia was part of the Nebulon Republic.

Treasure Planet
The newly-recreated Feminia was a planet in the Andromeda Galaxy. After arriving in the Andromeda Galaxy, the Bentenmaru took a sudden job involving a raid on Feminia. Cain, similar to Gruier Serenity, stowed away onboard a shuttle during the raid.