robot, Mettaton from Undertale, dynamic pose, square-shaped body, pink and black color scheme, star-shaped face, LED screen, heart-shaped core, metallic texture, shiny surface, robotic limbs, high-heeled boots, flamboyant personality, performing on stage, spotlights, confetti, cheering crowd, underground setting, vibrant colors, dramatic shadows, 3/4 view, action shot, stage lights, concert atmosphere, musical notes in the air, energetic expression, futuristic design, game character.