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The Stage Shellga is a stage-themed Shellga Type Jamen Beast of Dark Empire Yodonheim, released from the invasion gate with the dark energy gathered by Music Jamen. It is also one of two antagonist (the other is a Music Jamen) in episode 10 of 2020 TV series called Mashin Sentai Kiramager.
The Stage Shellga has first appeared on planet earth already disguised as a stage.
A while later the Stage Shellga (still in disguise) as his master was welcoming to this concert where they are going to be eaten by this beast. A while later Iyo with the invisible Jamenshi has arrived on stage as she performed this song that'll create darkness onto everyone that has a cursed ticket lodge in their hearts.
After the death of its master the Stage Shellga revealed itself prompting the team to bring out Kiramazin to battle this beast. After the counter attack Juru brought out Rolland as he used it to smash the beast in a giant version of Whack-a-Mole. However as soon as Smog Jouki shows up in the battle Sena was about to use King Express and gain control of the dark mecha, but Galza overwhelms it.
After that the Stage Shellga grabs hold of the Kiramazin and Galza was about to eliminate the team with this finisher called Burn Blacker, but thanks to Sayo's inspiration they manage to separate there zords as it hits the Jamen Beast instead. Once that was done the Stage Shellga was then destroyed by this finisher called Kiramai Dynamic.