This story is completely unrelated to the 3D models above:

Mario and Luigi had known no other way, constant bickering with a clear dominance on Mario's part. Luigi beared Mario's drunken and downright psychotic beatings and berations. This twisted Luigi beyond morals. Luigi would go on a fearful but rage filled rampage, his spirit disconnected from his corporeal form. His hate for Mario was even greater then his own maintenance of his soul beyond death. Therefore the hate manifested into a form of Luigi's worst nightmare. An characature of Mario as perceived through Luigi's lense would go on to haunt Luigi for eternity. Mario still dominant as always, a cycle unending. Mario's soul although kept alive by Luigi's hate may yet still detach due to his strong power levels. A mario free again to create more hate in a super sickening world, a super mario world (64).