Beat em up ... you mean like Mortal Kombat/Street fighter or the like?
Try search DC for some games ...
I can only remember one good beat em up Mortal Kombat clone ... and thats Deadly Tournament made by Heiko Thies of Click Corps. You can find it here: http://www.clickcorps.com/index.php?sec=2&item=3
If you mean something like Double Dragon, I think there is a somewhat "crude" example made by clickteam for TGF, which could probably be found on clickteams site.
Oh and good man for actually buying software
let me recall...
hmm...i don't quite remember any beat-em-up games in the klik world...or maybe there's none of them. But anyway, if you want some reference on making one, you may like to download little fighter 2. http://www.littlefighter.com
I mean games like Final Fight, Street of Rage, the ones that you were walking and some punks want to kill you. The example of TGF was "Kung Fu" but wasn't very good.
Biax: Yes, I bought MMF because I used TGF for almost 3 years, and It was excellent, the only problem was when you want to make games that were bigger than 300 x 200 and have scrolling they were very slow.
To be more specific...
I want to make a game about samurais, It will be a mix of RPG's and Beat'em Up, like Onimusha of PSX 2, in some parts you can walk and talk to the people but in other places you only fight, the walk part will be like an RPG and the battle places will be Beat'em Up, like Golden Axe of the Sega Genesis. Hope somebody understand what I'm talking about.
Shab: Yes something like that, the only difference is that in my game you are carrying a sword, not like others ninjas and samurai games where you throw shurikens.