Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Activate only if the 1 and only monster on your side of the field is "Chu-Ske the Mouse Fighter", "Monk Fighter", or "Master Monk". That monster cannot be destroyed as a result of battle, and is unaffected by any of your opponent's monster effects.
--孤高の格闘家
--Lone Wolf
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.filter(c)
	return c:IsFaceup() and c:IsCode(8508055,3810071,49814180)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local g=Duel.GetFieldGroup(tp,LOCATION_MZONE,0)
	if chk==0 then return #g==1 and s.filter(g:GetFirst()) end
	Duel.SetTargetCard(g)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if c:IsRelateToEffect(e) and tc:IsFaceup() and tc:IsRelateToEffect(e) then
		c:SetCardTarget(tc)
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE+EFFECT_FLAG_OWNER_RELATE)
		e1:SetRange(LOCATION_MZONE)
		e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
		e1:SetCondition(s.rcon)
		e1:SetValue(1)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1,true)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_IMMUNE_EFFECT)
		e2:SetValue(s.efilter)
		tc:RegisterEffect(e2,true)
	end
end
function s.rcon(e)
	return e:GetOwner():IsHasCardTarget(e:GetHandler())
end
function s.efilter(e,re)
	return re:IsMonsterEffect() and re:GetOwnerPlayer()~=e:GetOwnerPlayer()
end