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Railspike (J-5 in Japan) is a train-based Autobot from several branches of the Transformers franchise.
Robots in Disguise
Railspike is the leader of the Autobot unit known as Team Bullet Train, who form the Combiner Rail Racer.
According to "Ask Vector Prime", at least one universe would see Railspike undergo tragic reformatting at the "hands" of Megazarak's Robo-Smasher, with his frame becoming the new form of Astrotrain.