Infected Luigi SMB Deluxe color palette, he tried to stop the corrupted star but he was defeated.

to make fun of him, the star decided to mark Luigi's chest, also putting some of his "roots" on top of him, to prove that he was now just his puppet

Mario once said:

unused theme, was a mashup beetwen smb3 UG lethal impact remix and a smb2 boss remix, we didnt find where use it, still, i hope ya like it.