Oh my gosh this is complicated.
First you must have Mario.
Then go into the boo courtyard, and punch the big boo.
Ok go into the thing that pops out of him.
Go into the castle.
Get onto the balcony and use Mario to float up into the luigi picture.
THEN
follow boo's laugh (u'll see what i mean.)
then you'll go into the mirror room and see luigi and a big boo.
PUNCH BIG BOO!
when big boo dissapears punch his shadow.
Save the coins at the side, in case you lose power.
WHEN YOU KILL BOO, (which i havent)
THEN YOU'LL GET LUIGI'S KEY.
and if you don't know how to get Mario then tough because i ain't explaining that.
BYe!
You can not unlock Luigi in super Mario 64 without hacks, but he is playable in super Mario 64 DS
Link is not a character in Super Mario 64 DS. The available characters are Yoshi, Mario, Luigi, and Wario.
H
Mario, Yoshi, Luigi, and Wario
It isn't possible to get Waluigi in Super Mario 64 DS. Only Mario, Luigi, Wario, and Yoshi are playable characters.
on top of the castle
You need luigi
they were originally going to add him but there was no room for him but he is still found in the files of super Mario 64
you can unlock luigi detective.
Luigi is not in super Mario 64 on the Nintendo 64, that was a rumor. However, on the ds version you can play as him along with Wario and Yoshi.
No, You Can Only Play As Mario in N64, However, You Can Play as Mario, Luigi, Yoshi, and Wario On Super Mario 64 DS!
It's Yoshi, Mario, Luigi and Wario.