Originally Posted by
GoktimusPrime
Ambulon wasn't Defensor's leg. He was the right leg for a prototype Decepticon gestalt, but Ambulon later escaped and defected to the Autobots. I thought that the remaining members of that prototype gestalt team were either killed or MIA. It's also not known if Ambulon would've been even compatible to combine with Defensor either, as he was an early prototype; it's not as if a Constructicon can combine with a Protectobot. Actually, I don't think any of the IDW gestalts have been shown as being capable of swapping members between teams, even though the toys can ('cept Devvy).
Then again, Anglophone continuity's never really played up the whole "Scramburu Pawaah!" aspect of the interchangeable gestalts. ;)