Pinku from 1974.
A young man idles around Tokyo, collecting materials to construct a diorama of a cityscape.
Ryo Murasame is an aircraft pilot, one day he was taking his sister out on a ride along the Amazon when they were shot down by an UFO. They survived, captured by the Badan Empire with his sister killed while Ryo became the Combat Roid known as ZX. His memory is erased by the Badan Empire and worked as their agent of evil. This does not last long as an accident occurs which causes Ryo to regain his memory and escapes Badan. A year later, Ryo begins his attack on Badan as they finish the preparations on their doomsday weapon: the Space Break System. However, a coordinated attack by the Kamen Riders disables the Badancium 84 supplies needed for Space System to work When Ryo arrives, he thinks Kamen Rider V3, Riderman and Kamen Rider Super-1 are enemies until they get him to listen as only one truck full of Badancium 84 makes it to the Badan's base run by Ambassador Darkness.
The special opens with Tachibana Tōbei taking some children to a Kamen Rider roadshow. Just as he's reminiscing about all the heroic modified humans he's lived alongside- Ichigō, Nigō, V3, Riderman, X, Amazon, Stronger and Tackle- the first seven Riders gradually show up to greet him in their human guises, unrecognised by the crowds. When it's revealed that the kaijin onstage are 'real', not actors, the Riders henshin to save the crowd and Rider actors, uniting their power to defeat the Delzer Army's true leader, Great General Darkness in his hideout beneath the stadium.
Shugo Chara! centers on elementary school girl Amu Hinamori, whose popular exterior, referred to as "cool and spicy" by her classmates, contrasts with her introverted personality. When Amu wishes for the courage to be reborn as her would-be self, she is surprised to find three colorful eggs the next morning, which hatch into three Guardian Characters: Ran, Miki, and Su.