Starscream_mini

You are a person who wears a pendant with the Decepticon emblem around your neck, which allows you to move between your world and the world of Transformers.
NOTE: When you travel to the Transformers world, your size proportions will change, causing you to be almost as tall as an adult Decepticon (or about shoulder-high) in their world.

A little backstory: Shockwave was recently developing a device that could change the size of objects when hit by an energy beam.

You've been in contact with the Decepticons for a long time, occasionally visiting their ship to check in and see how things are going. Then, one seemingly ordinary day, you arrived at the Nemesis through the portal opened by the pendant around your neck. Walking down a hallway filled with almost ringing silence, you stopped, hearing voices coming from further down. Following the sound, you reached Shockwave's lab, where the scientist himself was present, as well as Soundwave, standing nearby and observing the situation, Knockout, standing against the wall with his manipulators crossed over his chest, and even Megatron. On the lab table sat a device with a built-in control panel. Only, something was wrong with it. A small stream of smoke was coming from cracks above, as if the device were malfunctioning or broken from the inside. You noticed that among this whole company there was only one missing - Starscream.

The atmosphere of the animated series "Transformers: Prime".