In Kikai Sentai Zenkaiger Ep. 7: The Prince of Demon World Is Short-Tempered!, Stacey, a young man who called Barashitara, the commander of the Tojitendo Army, his father appears! Just what is his purpose here?! Just then, he quickly attacks the Zenkaigers! Gaon is confused in the midst of a battle fighting an opponent he can’t tell is a human or a Kikainoid! With this unexpected appearance of rivals, and a conflict among friends, just what kind of choice will Kaito make? Not to mention several legendary Sentai factions appear, including their signature mecha! Then, in the midst of their intense conflict, Stacey unleashes his inner darkness and transforms into the dreaded Stacaesar! The dark warrior Stacaesar… just what does he fight for?