I was fooling around with my laptop and JCS (I had JJ2 1.22 on it). I put a box in the top left, which went from one corner to several tiles on the right. Than, I put the Devan with the robot controller outside it, and an activate boss underneath the start position. Than, I put in any old boss, besides the robot boss. Than, I forgot what happened, hehe. Something did, and it was cool.

Edit: Oh, yes, Jazz appears on the top right of the box, and starts doing a funny sidestep.

It works with 1.23.

Second edit: Make sure the box is very wide, at least 8 tiles wide.