Dion (G1)
- Dion is an Autobot from the Generation 1 continuity family.

Dion and his best friend Orion Pax are earnest dock workers. His is a simple life of manual labor, and he does not give a second thought to the war that may be brewing around him. War's pretty cool, after all, especially if they involve those new-fangled flying robots. Maybe someday he'll get to meet them...?
Fiction
Animated continuity
- Voice actor: Corey Burton (US), ? (Japan)
Nine million years ago, near the end of Cybertron's Golden Age, it was Dion's job to haul energy and supplies in and out of the dock in which he and his best friend worked. There were murmurs of attacks from new, flying robots, but Dion didn't worry -- if a war were coming, that's what they had Guardian robots for.

Dion and Orion were honored to meet the leader of these enigmatic warriors, Megatron, until Megatron revealed his plan to rob their dock of its energon stockpiles. After Megatron struck down Orion Pax and Ariel, Orion's girlfriend, Dion fought back valiantly, but he was also destroyed.
Time-traveling Aerialbots carried Orion Pax to Alpha Trion for repairs, and Dion's friend was rebuilt into Optimus Prime. Drones were sent back also to retrieve Ariel, but Dion's ultimate fate is uncertain.
Who is Dion?
Orion Pax and Ariel were rebuilt into Optimus Prime and Elita One, respectively, so many fans have speculated that Dion was also rebuilt into a familiar character. However, there are no hints within the episode itself, other than Dion was Orion's best friend. Regardless, the most popular suggestions are Ironhide, Ultra Magnus and Huffer.
(Dion's distinctive colour scheme had been seen earlier, however - on a member of Alpha Trion and Elita One's resistance/commando squad. The character never speaks nor is spoken to, but does have ties to two characters from Dion's past. Of course, the Autobot is likely female, which raises other questions altogether.)
Some believe the debate is irrelevant, believing Dion most likely dead and inconsequential, and possibly a casualty that hit close to home in Optimus Prime's early years as Autobot leader. After all, no specific mention is made of him in the episode after he dies, but Ariel is mentioned repeatedly. (Plus, his name can be read as "Dyin'," which may have been an intentional clue.)
Huffer
Huffer is considered a pontntial candidate for Dion for a number of reasons. Firstly and most obvious, the two share a very similar color scheme. Also, like Dion, Huffer is a reluctant warrior and would have rather leave the fighting to others. Lasty both Dion and Huffer have similar alt modes, Dion transforms into a cybertronian truck and Huffer, like Optimus Prime, into a semi truck cab. Prime has even been known to entrust Huffer in towing his trailer when he was unable to do it himself.
Ironhide
Ironhide could easily be Optimus Prime's oldest friend, and so he would seem like a good fit.
Ultra Magnus
Ultra Magnus is a popluar suggestion because his cab turns into a white version of Optimus Prime, and so it would stand to reason that if Alpha Trion rebuilt both of them, they would have similar designs. It's unlikely, however, that the writers of the episode could possibly have had Ultra Magnus in mind, as several writers have stated in interviews that they did not write any episodes with the upcoming movie and third season in mind.
In later years, various hints and references in subsequent Transformers stories have inferred that Dion was indeed Ultra Magnus. In the Robots in Disguise animated series, it's stated that Alpha Trion built both Optimus Prime and Ultra Magnus, a likely nod to the original episode. And in the Dreamwave comics continuity, Ultra Magnus leads Security Team Dion, another nod. However, both of these easter eggs take place in different continuities from the animated series, so they are not directly relevant.
Toys
Generation 1
- Orion Pax and Dion (E-Hobby, 2005)
- Japanese ID number: 67
- Dion is an extensively-painted redeco of the Mini Vehicle Wheelie, and came packaged with Orion Pax and Barrelroller. He transforms into a yellow and blue Cybertronic car.

