Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
The first time this card would be destroyed by battle each turn, it is not destroyed. Once per turn: You can target 1 of your "Battlin' Boxer" monsters that is banished or in your GY, that has a Level; all "Battlin' Boxer" monsters you currently control become that monster's current Level.
--BK ビッグバンテージ
--Battlin' Boxer Big Bandage
local s,id=GetID()
function s.initial_effect(c)
	--battle indes
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCode(EFFECT_INDESTRUCTABLE_COUNT)
	e1:SetCountLimit(1)
	e1:SetValue(s.valcon)
	c:RegisterEffect(e1)
	--level
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCountLimit(1)
	e2:SetTarget(s.lvtg)
	e2:SetOperation(s.lvop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_BATTLIN_BOXER}
function s.valcon(e,re,r,rp)
	return (r&REASON_BATTLE)~=0
end
function s.filter(c)
	return c:HasLevel() and c:IsSetCard(SET_BATTLIN_BOXER) and (c:IsLocation(LOCATION_GRAVE) or c:IsFaceup())
end
function s.lvfilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_BATTLIN_BOXER) and c:HasLevel()
end
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE|LOCATION_REMOVED) and chkc:IsControler(tp) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_GRAVE|LOCATION_REMOVED,0,1,nil)
		and Duel.IsExistingMatchingCard(s.lvfilter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,s.filter,tp,LOCATION_GRAVE|LOCATION_REMOVED,0,1,1,nil)
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) then return end
	local lv=tc:GetLevel()
	local g=Duel.GetMatchingGroup(s.lvfilter,tp,LOCATION_MZONE,0,nil)
	local lc=g:GetFirst()
	for lc in aux.Next(g) do
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_CHANGE_LEVEL)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetValue(lv)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		lc:RegisterEffect(e1)
	end
end