Gunship

Samus' Hunter-Class Gunship has appeared in every game since Metroid II. It can be returned to save one's progress, and restore health and amunition.

Appearance
Samus' ship has been given any facelifts.

Although there was no color in Metroid II, it can be assumed that the gunship in Metroid II and Super Metroid were the same, as they are the same shape. In Metroid Fusion, the ship is destroyed in a crash during the opening sequence, and is replaced by a purple ship.

The ship in Prime and Prime 2 are the same, and are likely the same as the ones in Super Metroid and Metroid II, most likely Hunters aswell.

There is no ship in Metroid I.