How do I do it?

I made the boss chase the hero. I want to know how to make it so that when the hero jumps on the boss, the boss moves to the side, distancing himself from the hero, like in Mario Bros. on Super Nintendo. Is there a video tutorial on how to do this?

I assume both objects has the Platform behavior?

You can try something like this, but it may require some tweaking.

Note that the first event is an OR-block - here is jumping OR hero is falling.