Completely new TR series aircraft of the Titans T3 Unit! Mobile Suit Z Gundam Gaiden: Advance of Z Titans" depicts the activities of the Titans T3 Unit, a Titans test unit, in the same time axis as "Mobile Suit Z Gundam". After being serialized in Dengeki Hobby Magazine, it is now being made into kits one after another as a popular content in Gunpla. In the 19th issue of HJ Mechanics, we focus once again on this work, explaining the MS that appear in this work with examples of Gundam Model Kits. We also include a digest of the storyline, and reexamine the appeal of this work.