For years I've been telling people I once had a giant transformer who turned into a train and rocket launcher. I could never remember it's name... until today! I give you Omega
Transformers Energon: Omega Supreme by Hasbro | FigureFan Zero
Transformers Energon: Omega Supreme by Hasbro | FigureFan Zero
Omega Supreme (Energon) - Transformers Wiki
Supreme Class Omega Supreme (Transformers, Energon, Autobot) | Transformerland.com - Collector's Guide Toy Info