Unlocking Luigi in Super Mario 64 DS is one of those classic Nintendo tasks that sounds simple until you find yourself wandering a haunted mansion, listening to a ghost laugh through walls, and wondering whether the game is testing your platforming skills or your patience. Good news: Luigi is absolutely unlockable, and no, you do not need 100 stars, a secret cheat code, or a whispered playground rumor from 2005.
In this guide, you’ll learn exactly how to get Luigi on Super Mario 64 DS in 11 clear steps. The short version is this: unlock Mario first, collect enough Power Stars to reach Big Boo’s Haunt, enter the Luigi portrait, beat King Boo, take the Luigi Key, and open Luigi’s door in the castle character room. The long version is more fun, more useful, and less likely to end with you falling into the same ghostly pit twelve times.
Luigi is worth the effort. He jumps beautifully, moves with his usual slippery charm, and has access to his invisibility power through Power Flowers. Once unlocked, he becomes one of the most useful characters in the game, especially for secret areas, tricky platforming, and later progress toward Wario.
What You Need Before Unlocking Luigi
Before chasing the green brother, make sure you have the right setup. Super Mario 64 DS begins with Yoshi as the default playable character. Mario, Luigi, and Wario are trapped behind character doors, and each must be rescued with a special key. Luigi cannot be unlocked immediately from a brand-new save file.
Minimum Requirements
To unlock Luigi, you need three important things:
- Mario unlocked as a playable character
- At least 15 Power Stars
- Access to Big Boo’s Haunt
The reason Mario is required is simple: the Luigi rescue path begins inside Big Boo’s Haunt and leads to a secret course called Big Boo Battle. Mario is the intended character for entering the Luigi portrait and fighting King Boo. Yoshi may be adorable, but this is not his ghost-busting moment. Let the dinosaur sit this one out and enjoy a snack.
How to Get Luigi on Super Mario 64 DS: 11 Steps
Step 1: Start by Unlocking Mario
If you already have Mario, skip ahead. If not, your first mission is to rescue him. From the castle lobby, collect enough Power Stars to access the Mario portrait area. You will need to enter the Mario painting, reach Goomboss, and defeat him to earn Mario’s Key.
Once you have Mario’s Key, return to the character room near the castle entrance and unlock the door marked with the red “M.” Mario then becomes playable. This matters because Mario’s abilities are required for the Luigi route, especially when dealing with Boos and the Power Flower path inside Big Boo’s Haunt.
Step 2: Collect at Least 15 Power Stars
Next, collect 15 Power Stars. You can earn these from early courses like Bob-omb Battlefield, Whomp’s Fortress, Jolly Roger Bay, Cool, Cool Mountain, and other accessible areas. You do not need to be perfect. You just need enough stars to open the way to Big Boo’s Haunt.
If you are short on stars, focus on easier missions first. Bob-omb Battlefield is great for quick stars, and Whomp’s Fortress has several manageable objectives once you understand the layout. Avoid spending an hour trying to grab one awkward star if five easier ones are waiting nearby. This is not a tax audit; choose the path of least pain.
Step 3: Go to the Castle Courtyard
After you have 15 Power Stars and Mario unlocked, head to the castle courtyard. From the main lobby, go through the door that leads toward the back garden area. The courtyard is filled with Boos, and one larger Boo will be carrying a small cage.
This cage is your entrance to Big Boo’s Haunt. The game does not roll out a red carpet or put up a sign saying “Luigi Rescue Mission This Way.” Instead, it hides the entrance in a ghost’s possession, because apparently haunted architecture was having a very creative week.
Step 4: Defeat the Big Boo Holding the Cage
Use Mario to defeat the large Boo in the courtyard. Like other Boos, it becomes vulnerable when you attack from behind or use a ground pound carefully. Avoid staring directly at it for too long because Boos are shy in the most inconvenient way possible.
After you defeat the Big Boo, the cage drops. Jump into the cage to enter Big Boo’s Haunt. This course is darker and trickier than the early levels, but you do not need to complete every mission inside it to unlock Luigi. Your real goal is reaching the Luigi portrait hidden in the mansion.
Step 5: Enter the Mansion in Big Boo’s Haunt
Once inside Big Boo’s Haunt, head straight into the mansion. The main building has several rooms, enemies, and haunted surprises. You may want to move carefully, especially if you are still getting used to the DS controls or camera.
The haunted mansion is not just spooky decoration. Its layout matters. You need to reach the upper area where Mario can use a Power Flower to float to a hidden section. If you get turned around, return to the main foyer and reset your route. In haunted houses and grocery stores, sometimes the smartest move is admitting you are lost.
Step 6: Go Upstairs and Find the Power Flower Room
Inside the mansion, go up the stairs. Look for the room that contains a red ? Block. This block is important because Mario can use the Power Flower inside to become Balloon Mario, allowing him to float upward.
If the ? Blocks are not active in your game yet, you may need to activate the ? Switch first. Once active, Mario can punch the red ? Block and use the Power Flower. Float upward carefully and aim for the upper ledge or hidden door area above the room.
Step 7: Enter the Luigi Portrait
After using the Power Flower to reach the upper area, enter the door that leads to the room with Luigi’s portrait. This painting is the entrance to Big Boo Battle, the secret course where Luigi’s Key is found.
Jump into the Luigi painting. If nothing happens, double-check that you are using Mario and that you are entering the correct portrait inside Big Boo’s Haunt, not a decorative Luigi image elsewhere in the castle. Many players get stuck here because they find the wrong Luigi-related visual and assume the game is broken. It is not broken. It is just being very Nintendo.
Step 8: Navigate the Big Boo Battle Maze
Big Boo Battle is a maze-like secret level. If you take the wrong door, you may be sent back to the beginning. The key to moving forward is following the sound of King Boo’s laugh. The louder the laugh, the closer you are to the correct route.
A reliable door pattern is: right, left, right, left. After that, keep moving forward until you reach a set of platforms and a hole that leads to the boss room. Move patiently, because the level includes falling bridges, rotating platforms, enemies, and pits that reset your progress. Falling does not necessarily mean disaster, but it does mean another walk through the ghost maze. Luigi is waiting, but he is apparently not in a hurry.
Step 9: Drop Into the Mirror Room
At the end of the maze, drop into the hole to reach a room with a large mirror. This is where the Luigi rescue fight begins. Approach the mirror, and King Boo will appear. The mirror is not just visual flair; it is the main trick of the battle.
King Boo may appear on one side while his position or shadow gives you clues on the other side. Use the mirror and shadow to figure out where he really is. The fight rewards observation more than button-mashing. If you rush blindly, King Boo will happily turn the battle into a comedy sketch starring you as the confused plumber.
Step 10: Defeat King Boo
To beat King Boo, attack him three times. The best method is to sneak behind him and punch or ground pound. Like other Boos, he avoids direct confrontation when you face him, so do not chase him head-on. Use his shadow, the mirror, and his movement pattern to get behind him.
After each hit, King Boo changes behavior and becomes faster. Stay calm, keep your camera centered when needed, and do not let the mirror confuse you. If you take damage, look for coins along the room’s edges to refill your health. Once you land the third hit, King Boo is defeated and drops the Luigi Key.
Step 11: Use the Luigi Key to Unlock Luigi’s Door
Grab the Luigi Key and return to Peach’s Castle. Go back to the character-switching room near the castle entrance. Find the door marked with the green “L” and use the key.
Congratulations: Luigi is now unlocked in Super Mario 64 DS. From this point on, you can enter Luigi’s room and switch to him whenever you want. Luigi caps will also become available in various courses, allowing other characters to temporarily transform into Luigi in certain areas.
Why Unlocking Luigi Matters
Luigi is more than a bonus character. He changes how you approach the game. His jump control makes many platforming sections easier, and his special Power Flower ability lets him become invisible. This invisibility is required or extremely helpful for specific stars and secrets, including later progression toward unlocking Wario.
Compared with Mario, Luigi feels floatier and slightly less grounded. That can be a blessing or a curse depending on the course. On narrow platforms, he may feel slippery at first. On long jumps and tricky gaps, he can feel like the game suddenly handed you a graceful green parachute.
Common Mistakes When Trying to Unlock Luigi
Trying to Unlock Luigi Before Mario
The most common mistake is trying to reach Luigi while still playing as Yoshi. Yoshi is the starting character, but Luigi’s route is designed around Mario. Unlock Mario first, then return with enough stars to open Big Boo’s Haunt.
Entering the Wrong Luigi Image
Another common issue is confusing Luigi’s portrait in Big Boo’s Haunt with other Luigi-related visuals. The correct portrait is found after using Mario’s Power Flower inside the haunted mansion. If jumping into a picture does nothing, you are probably in the wrong place or missing a requirement.
Ignoring the Laugh in the Maze
The Big Boo Battle maze is audio-based. King Boo’s laugh helps guide you. If you play with sound low or muted, the maze becomes more annoying than it needs to be. Turn the volume up enough to hear directional clues, or use the known right-left-right-left route carefully.
Facing King Boo Directly
Boos do not like being watched. King Boo follows the same basic ghost logic. Do not run at him from the front. Circle around, use the mirror, watch the shadow, and strike from behind. It is ghost etiquette, apparently.
Tips for Making the Luigi Unlock Easier
Use the Camera Often
The DS camera can be your best friend or your tiny handheld nemesis. Recenter it often, especially in Big Boo Battle. A bad camera angle can make simple jumps feel like advanced plumbing gymnastics.
Collect Coins During the Boss Fight
Coins restore your health, so do not ignore them. If King Boo hits you, take a moment to recover instead of rushing back into danger. A patient player with full health beats a panicked player with one health wedge and a dream.
Practice Mario’s Movement First
If you have been playing mostly as Yoshi, spend a few minutes getting comfortable with Mario’s punches, jumps, and ground pounds. The King Boo fight is not terribly hard, but unfamiliar controls can make it messy.
Extra Player Experience: What Unlocking Luigi Feels Like
Unlocking Luigi in Super Mario 64 DS has a special kind of old-school charm. It feels like a secret that the game expects you to earn, not simply collect. Unlike modern games that often mark every objective with a glowing arrow, this one asks you to pay attention. It wants you to explore the castle, notice strange rooms, experiment with character abilities, and listen to a ghost laughing somewhere beyond the next door.
The first time you go after Luigi, the process can feel mysterious. You might have 15 stars and still not understand why the courtyard Boo matters. You might enter Big Boo’s Haunt and complete a few regular stars before realizing there is an entirely separate rescue mission hidden inside the mansion. Then you find the Power Flower room, float upward with Mario, enter the Luigi portrait, and suddenly the game reveals another secret layer. It is a great example of why Super Mario 64 DS remains memorable: the castle feels like a puzzle box.
The Big Boo Battle maze is especially interesting because it uses sound as a guide. Following King Boo’s laugh makes the level feel different from a normal platforming challenge. You are not just jumping across platforms; you are tracking a ghost. That small design choice turns a simple door maze into something atmospheric. It is spooky, but in the playful Nintendo way, where danger wears a grin and probably has excellent comic timing.
The mirror fight is also one of the coolest character-unlock battles in the game. The idea that King Boo’s position must be read through reflection and shadow gives the battle personality. It is not the hardest boss fight, but it is memorable because it asks you to think. Many players lose a few hits at first because they chase what they see directly instead of studying the mirror. Once the trick clicks, the fight becomes satisfying rather than frustrating.
And then there is the reward: Luigi himself. After returning to the castle and opening the green “L” door, you finally get access to a character who feels noticeably different. Luigi’s movement has personality. His jumps feel elegant, his floatiness changes platforming routes, and his invisibility power opens new possibilities. He is not just Mario in green clothes. He is a different tool for solving the game.
For many players, unlocking Luigi is the moment Super Mario 64 DS really expands. Before Luigi, the game is already a clever remake. After Luigi, it becomes a character-based adventure where choosing the right hero matters. Mario is balanced, Yoshi is unique, Wario is powerful, and Luigi is the stylish jumper who slips through danger like he has somewhere better to be.
If you are replaying the game years later, the Luigi unlock route may feel nostalgic in the best way. It brings back the era of handheld secrets, schoolyard tips, printed walkthroughs, and that one friend who insisted Luigi required 99 stars and a full moon. Thankfully, the real method is much simpler. Unlock Mario, collect 15 stars, brave the haunted mansion, defeat King Boo, and open the green door. That is the true path to Luigi.
Final Thoughts
Learning how to get Luigi on Super Mario 64 DS is one of the most rewarding parts of the game. The process teaches you how character abilities, hidden entrances, secret courses, and boss keys all connect. It also gives you access to one of the most useful characters in the entire adventure.
To recap: unlock Mario, collect 15 Power Stars, enter Big Boo’s Haunt through the courtyard cage, use Mario’s Power Flower to reach the Luigi portrait, navigate Big Boo Battle, defeat King Boo, collect the Luigi Key, and unlock the green “L” door. Once Luigi joins your team, the castle becomes easier, stranger, and much more fun to explore.
