Reverse-pretender technology
From MediaWiki

Reverse-pretender technology is an inversion of the usual Pretender process - rather than a Transformer hiding inside an organic shell, this technology allows a human to appear as a Transformer. It is unknown if it imparts a larger size, or if a human employing the technique would be a mere six or seven foot tall robot.
Fiction
Generation 1 commercials
At the end of many commercials, kids would mouth "Robots in disguise!" as they transform into either Galvatron or Ultra Magnus. Commercial#Generation 1
Transformers Animated
Jim Sorenson and Bill Forster used reverse-pretender technology, salvaged from Epsilon Holdings, to interview Decepticons as their equals. AllSpark Almanac

