The Biggest Bye'cha of All: Part One is the 82nd chapter of the Dr. Slump manga. Its sequel is "The Biggest Bye'cha of All: Part Two".
Summary[]
On board of spaceship that has the shape of Ultraman's head, three humanoid invaders approach Earth. Despite being adults, those three aliens are all very childish and want to conquer the planet to make it their gigantic playground. The send a small flying camera to Penguin Village, and see individuals like King Nikochan and Dr. Mashirito. They then see Arale Norimaki, who plays with the camera. When they attack her via the camera, she destroys it using her N'cha Cannon. The invaders then send their Mobile-Suit Farca to Earth.