You don't unlock him, he's already a playable charecter, you just select him on the chareter list, there's: mario, luigi, toad, and princess toadstool (she's called that before Super Mario 64).
You can not unlock Luigi in super Mario 64 without hacks, but he is playable in super Mario 64 DS
you can unlock luigi detective.
You can't. The only four players are Mario, Luigi, Yellow Toad, and Blue Toad.
Yes, Luigi is Mario's twin brother, in fact. Luigi is the "brother" in "Super Mario Brothers". They are called the "Super Mario Brothers" because Mario is the older twin, more popular than Luigi, and was introduced 2 years before Luigi in 1981.
Super Luigi Galaxy isn't a real game but in both Super Mario Galaxy and Super Mario Galaxy 2 you can unlock Luigi and play him.
Mario and Luigi.
Yes, Luigi is playable in Super Mario Galaxy. You unlock him after getting all 120 stars as Mario.
Yes
In the original you can play as Mario and Luigi. In New Super Mario Bros DS you can play as MArio AND LUIGI. IN NEW SUPER MARIO BROS WII ITS MARIO, LUIGI, BLUE TOAD, AND YELLOW TOAD.
Two. Mario and Luigi. Wario and Waluigi are not brothers to the Mario bros.
if you mean the name of the bros its Mario and Luigi but if you mean the name of the game its new super Mario bros
Shigeru Miyamoto designed Mario and Luigi.