Enemies would attack it on sight. And then it would smack them. The wayward mecha knight will just wander around if nothing hits it.
EDIT: maybe it would show some "innocent" interest and follow players around while generally avoiding enemies until they attack it (which would be hilarious to watch). Players in range of enemies would have a stronger aggro pull than the knight, of course.
This sort of entity reminds me so much of the old design of the tortodrones which was an awesome design. Now in the clockworks, the only kind of neutral party is the shanckle's and wisps. Anyway, this would definitely be an interesting sight. Though i feel this mecha knight should not only be found through the mecha knight kit summons, but also be able to be found in construct levels also. This way, this mecha is encountered more often.
It isn't found with mecha knight kits.
It has a small chance to replace any Mecha Knight.
I'd love to see such a thing in the clockworks! Being its own "neutral" team is a nice touch, but would enemies attack it as if it were a friendly mecha knight, or ignore it as if it were an enemy (until a stray attack turns it to your side)?