Made an appearance in Super Robot Wars - the original series, The Last Red Shoulder, Red Shoulder Document: Roots of Ambition, and Pailsen Files all debuted in Super Robot Wars Z2, and Shining Heresy and Big Battle debuted in Z3. Fortunately, it was a debut fans have been clamoring for for a long time, and those that didn't got introduced to the series in a gigantic Colbert Bump.
A BGM named "The Advance of Warhorses" popped up at the beginning of Scenario 29 of Super Robot Wars Z2: Saisei-Hen, which makes Chirico go nuts. This song is remade from the original Red Shoulder March of Armored Trooper VOTOMS since Banpresto couldn't purchase the song's licensing, but this version is very well-conceived. The reason Banpresto couldn't purchase the song's licensing should be noted: The "Red Shoulder March" was originally orchestrated as "Arrivano I Marines", a song from the obscure 1966 Italian Comedy Due Marines E Un Generale. The fact that the song that is used as "PTSD in music form" was composed for a Comedy is an odd turn of events in its own right.
The Other Darrin: Yuri Nashiwa voiced the Phantom Lady/Fyana in her first speaking appearance in episode 3, but was quickly replaced with Kazuko Yanaga. Albert Killy was initially voiced by Kenichi Ogata in the first episode, but was voiced by Saburo Kamei in all appearances afterwards.