The Devils Within The Chaos [Book 1]

In 1971, a scientific expedition in Oklahoma, United States. A group of Scientists had uncovered an ancient artifact containing the remains of the demon Giff, leading to the creation of the Vistamps.

In the present day, the remains of Giff now lie in the hands of a demon cult called the Deadmans, who seek to resurrect him by converting peoples' Inner Devils into their fold.

Fenix, a governmental organization opposing the Deadmans, have developed the Revice Driver for someone with complete control over their inner devil.

Which a Young Man named Takeshi Igarashi, had came into acquisition of the Driver while forming a contract with his Inner Devil: Vice.

And together, they became Kamen Rider Revi and Kamen Rider Vice, Aka Kamen Rider Revice.

Along the journey, Takeshi and his family had encountered a Blue Hedgehog named Sonic, who's on the run from a Evil Scientist named Doctor Ivo Robotnik.

While on the journey, The Igarashi family has started to see Sonic as a part of their family, which after banishing Robotnik to another planet. they took the Blue Hedgehog into their family, as they fight against the Deadmans.

P.s I don't own Kamen Rider Revice or Sonic Movieverse, they belong to Toei, Paramount, and Sega... Also, it's set in Sonic 1 and 2, along with the first arc of Revice.