Is there a Scriptable Auto Splitter for the NSMB.W game on Livesplit? If so link me please.
And can we create one?

There isn't currently a auto-splitter for this game. If you'd like to create one, you're welcome to.

Also the reason that this game deosn't have an auto-splitter is because you cannot read the game data while playing becuas emu is banned. If a visual auto-splitter was created (e.g. when black screen happens, split) then it would only work for capture card runners who have a decent quality capture card.

Ok but how do I create one? (For capture card)

This might help. Haven't done it myself though so you're on your own when it comes to installing and setting it up https://github.com/ROMaster2/LiveSplit.VideoAutoSplit

I believe Lachurs has tried to create one in the past but it broke at 5-Ghost House because of how dark the level is

never give up

Ok

but if your using slobs it won't work just saying