making this into a on enter script?

changing this toa on enter script?

function ChangeMe(hit)
	if hit.Parent == nil then return end
	if (hit.Parent:findFirstChild("Humanoid") == nil) then return end
	local human = hit.Parent:findFirstChild("Humanoid") 
	local char = hit.Parent
	local player = game.Players:GetPlayerFromCharacter(hit.Parent)
	if (human ~= nil) and debounce == false then
		debounce = true
		originals = char:getChildren()
		for w = 1, #originals do
			if originals[w].className == "CharacterMesh" then
				originals[w]:remove()
			end
		end
		meshes = script:getChildren()
		for y = 1, #meshes do
			copy = meshes[y]:clone()
			copy.Parent = char
		end
	end
	wait(0)
	debounce = false
end

script.Parent.Touched:connect(ChangeMe)

Hello! So this fix is fairly simple! Let me explain it a little bit first.

The way I approach this is by using the PlayerAdded event! It's simple and easy too. Now the problem is how you have you function setup, so I will edit you code to make it compatible with the new code!

Below, is the framework for the new stuff!

function changeMe(player) -- Has the player and is called when a player is added!
end

game.Players.PlayerAdded:connect(changeMe()) -- "PlayerAdded" returns the player thus we can easily edit them!

Now that we have the framework, let's continue with the explaination!

function changeMe(player)
	local character = player.Character or player:WaitForChild("Character") -- Gets the player's character!
	local humanoid = character.Humanoid or character:WaitForChild("Humanoid")
	if (humanoid ~= nil) and debounce == false then
		debounce = true
		originals = character:GetChildren()
		for _, object in pairs(originals) do
			if object:IsA("CharacterMesh") then
				object:Remove()
			end
		end
		meshes = script:GetChildren()
		for _, object in pairs(meshes) do
			copy = object:Clone()
			copy.Parent = character
		end
	end
	wait()
	debounce = false
end

game.Players.PlayerAdded:connect(changeMe())

I definitely changed A Lot of code, but I won't leave you stranded!

If you see, I changed you "for loops" to be MUCH more efficient! Now what they do specifically, is cycle through a table and return two things, the index and the table item! The , object are those two parameters, but since we don't need the index, I wrote mine as a garbage variable or "". Here is also a link for more information on loops, including the one I used!

P.S. Don't copy my code and expect it to fully work! Skim over it to see if there are errors and if there are errors, please let me know!