Basically, Mario 64 and Ocarina of Time leaked some stuff. Inside it, a model and audio files were found for Luigi. After some work, you can play as Luigi in-game now. Funnily enough, it released 24 years and one month after Mario 64's release and the message supposedly read "L is Real 2401". Also to go full conspiracy mode 2+4+0+1=7 and 24+01 is 25. It got leaked on the 25th of the 7th month of July, can't make this shit up. We're on the weirdest timeline rn.