Shinkansen Henkei Robo Shinkalion: Mirai kara Kita Shinsoku no ALFA-X

A group called the Shinkansen Ultra Evolution Institute was investigating a recent rash of monster attacks happening in Japan after the appearance of a mysterious Black Shinkansen. The SUEI had a major weapon for the fight - Shinkalions, bullet trains that can transform into giant mecha. One boy, Ha