Optimus Primal, the valiant leader of the Maximals, dramatically transforming into a sleek yellow pikachu form against the backdrop of a futuristic city skyline at twilight. His robotic body, traditionally adorned in vibrant oranges and blues, has undergone a bright metamorphosis, with panels reshaping into angle-like wings and armor plating reconfiguring into a streamlined, menacing silhouette. His visor glows with an holy yellow light, piercing through the aurora night. The cityscape below is a blend of neon lights and steel structures, reflecting off the glossy surfaces of the angle's wings. The transformation is captured mid-flight, with a trail of energy emanating from the point of change, illustrating the seamless transition from beast to machine. The scene is charged with an atmosphere of stealth and power as Optimus Primal, in this new guise, surveys the urban sprawl with a watchful gaze, ready to protect and serve from the skies above. The juxtaposition of the organic and mechanical forms creates a dynamic tension, emphasizing the duality inherent in the Beast Wars universe. This bright, edgier incarnation of Optimus Primal embodies the essence of a nocturnal protector, poised to strike fear into the hearts of his foes and maintain peace in the ever-evolving world of the Transformers.