prevent from overlapping

<img src="http://neuropod.net/imagehost/uploads/e467b2f56ddfe58a11ce7a03a326fe09.png" border="0" />

Those 4 pirates are my basic enemies in my game. how do I make them NOT OVERLAP one another as well as the player (char at the leftmost part of screen)?

Edit:

by "overlap", I mean that that each of the characters have a "body", so of course, a body cannot occupy the same space already occupied by another person.

I first thought of adding solid behavior, but that would result in my chars being treated as a floor (you can step over the object with solid behavior)

Easiest way would probably be setting them to solid and creating on collision events for when you'd land on top of them.

what could I possibly use? Aside from using solid behavior, I have thought of manually coding events like using condition "object on collision with" but so far, my problem is what action to use

LittleStain

btw, I don't see you online in skype anymore. I have another question to ask.