Well unlike many of you I've decided to dig deep on the net, make a few phone calls etc. And it turns out we are all wrong
The robot that gets turned into Cyclonus is in fact Hound.
What the original script called for:
When Prime, Sunstreaker and Hound land at Autobot city, Prime orders Sunstreaker to reinforce the left flank and orders Hound to use his holographic abilities to spy out what the Decepticons next move in battle would be. Instead of camoflauging himself as a rock or he camoflauges himself as a Decepticon.
(Here is where the confusion lays as it lists in the notes as 'either Insecticon or Jet' as they were the character models there could be multiples of at any one time).
Hound gets caught up in the evacuation in Astrotrain and ends up stuck there in his disguise. He ends up getting thrown out the airlock, still holographically camouflaged as either as a Seeker (Jet) or Insecticon.
When the formatting takes place, as the change animation happens you briefly see Hound's face appear between his holographic disguise disappearing and his new form emerging.
Unfortunately this storyline was cut from the final draft of the script, but you see the hangovers from it, such as there being two Cyclonus' (as they hadn't decided yet whether Hound would be an Insecticon or a Seeker when disguised) and why Cyclonus was written as the most honourable Decepticon in season 3, due to the fact he had been reformatted from an Autobot rather than a Decepticon.
There ya go, answered
Well many of us have found it quite invigorating and enlightening![]()