Transition form

A transition form is a stage of Transformer physiology from the live action movie continuity family.

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 complete the "meteor" disguise better.

After making (mostly) controlled planetfall, the traveling Transformer changes back to its humanoid (or more mobile) protoform mode and immediately begins trans-scanning for a new exostructure/disguise.

The potential devastation caused by impact means the transition form can be used as a weapon. Optimus Prime once used his protoform mode to turn himself into a missile, launching himself into Decepticon territory and hitting like a bomb. The Decepticon Who Haunted Himself

Toys

Movie preview toys

• Protoform Optimus Prime
• Protoform Starscream

Trans Scanning toys

• Trans Scanning Bumblebee
• Trans Scanning Optimus Prime

Japanese-only releases, these figures are able to transform into the Protoform, Transition, and Earth forms of their respective robots by utilizing snap-on armor.

Revenge of the Fallen toys

• Ravage

Soundwave's Missile can also be considered as the transition mode of Ravage, even if the missile itself does not convert into Ravage.