A Transition form is a comet or meteor-like elongated ellipsoid form that a protoform stage Transformer can change into for interstellar travel. Transition forms are heavily armored and capable of space flight over extended distances. Naturally metallic and frequently engraved with unknown writing in the Transformers' own language the transition form picks up a coating of space dust and debris as it travels the galaxy. This rocky material forms a rough crust over the surface of the Transformer to better complete the "meteor" disguise.