https://uploadfiles.io/jn4vt here is the boss's files, for some reason he looks left all of the time.
In your monstertype file, have you tried changing : "animation" : "Wyvern.animation", "reversed" : true, into "animation" : "Wyvern.animation", "reversed" : false, I notice in the dragon boss files, it is set to false. So maybe that is what it needs to be?
