just change player skin that not what a disguise skript need to do.

wwwwwwwwwwww

You literally copied LibsDisguises and DiSKuise.
It doesn't state any skript addons I need for the skript either.
SkriptGod? SkriptBald, very bald skript.

Which version of skript even accepts "arg 1"? As far as I know the format should have been arranged as "arg-1"

I also have no idea which version of skript can use local variable across different events. "{_disguised}" - "{_disguised.%arg-1%}" are under different commands. (these aren't even the same variable, meaning if you EVEN get the chance to disguises a player, you can't even undisguised them)

And I'm not even going to ask about this one, lines 6 12 22 all result in:
"Can't change the Minecraft name of a player. Change the 'display name' or 'tab list name' instead"

I used this to make a player on my server think I was Notch and watched them freak out on voice chat. It was HILARIOUS!