Kamen Rider Flip

Kamen Rider Dupe is a fanseries created by Emily Becker. Its tagline is "I am the one-in-two Kamen Rider!"

Story
Masato Futami has grown up around scientists-his father and the father of his close friend Aimi are partners who specialize in cloning animals. Since they turned their focus to trying to clone a human, they have garnered much media attention-something Masato relishes in. But secretly, their failed attempts at cloning humans augmented with animal DNA are out to exact revenge on the world-and their creator especially. Masato's father entrusts him with a special belt and capsules that he realizes he can use to fight these multiplied monsters-he gains a clone himself and becomes Dupe.

Trivia

 * The series tagline could be considered a reversal to Kamen Rider Double-Double is 2-in-1, Dupe is 1-in-2.