Kamen Rider: Dragon Knight

Teenager Kit Taylor discovers a mysterious deck of Advent Cards that grant him the power to transform into an ancient armored warrior called a Kamen Rider. He joins Kamen Rider comrade Wing Knight to battle the renegade warlord General Xaviax and his army in both the real world and an alternate reality called Ventara, or Mirror World.

Keywords: amnesia, kidnapping, superhero, alternate dimension, alien