[+] Others:

head-squirrel.xml

head-clownmask.xml

head-fluffyhat.xml

head-chiefcrown.xml

head-gladiator.xml

head-pinkyhead.xml
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About Stats on monster: I use the following on test but maybe it could be balanced better.
mob_DB.txt:
1041,Centaur,Centaur,140,6000,0,0,100,2,180,220,2,10,20,40,10,10,40,50,1,1,1,0,
21,131,600,900,[DROPS],
0,0,0,0,0,0,0,0,,,,,,,1,20
(Tested on happiness.doesntexist.org server, if you wanna play and test it contact me on game.)

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About general progress: I was doing the spritesheet and .XML of monster to can test the animations with delay values on game.
There´s the .png and .xml Including death positions and Up walk (Up attack is not completed yet, but I replaced the values on xml to fit with Down attack).