Raiden

Raiden is an Autobot from the Headmasters portion of Generation 1.

Raiden is the combined form of the six Trainbots Kaen, Getsui, Seizan, Shouki, Suiken, and Yukikaze.

Each member transforms into a different Japanese high speed or bullet train. Raiden is an ambitious gestalt. He maintains an active rivalry with Devastator and plans on challenging the Decepticon giant Predaking next.

Headmasters
In Transformers: Headmasters, the Trainbots helped transport their Autobot comrades to and from battle. He was always ready to counter Decepticon combiner teams with his terrific strength and Train Bazooka.

Toys
Released only in Japan, Raiden's toy dates back to the Diaclone line, similar to the Constructicons. For Headmasters, the Trainbots were available individually or in a gift set. They were later re-released during Transformers: Zone. Like Devastator, each Trainbot member becomes a specific part of Raiden; most appendages cannot be swapped like the later Scramble City combiners.

There are many knock-off molds available as well, with varying degrees of quality.