Railspike Major

Railspike Major is an Autobot from the Animated continuity family.

Have you seen me?

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Railspike Major is the Autobot bonded to Theta Supreme, an Omega Sentinel. Theta Supreme was crippled by a plasma mine/blaster over Beta IV, and his connection to Railspike Major was presumably severed when Starscream destroyed him while he was being towed away.