Mario vs Luigi This page documents how to play MvsL hacks and objects that work in MvsL. Modding MvsL is significantly more difficult than modding Singleplayer levels. If you're just getting started with modding the game, you might want to start here FaQ How do I play Mario vs Luigi hacks? The easiest way to play an MvsL hack on real hardware is by using “Multi-cart” This requires that you own two flashcards (such as an R4 Card). To set this method up, simply put the same ROM on both flashcards. Then, in the game, choose the option to “Compete with another New Super Mario Bros. Owner” and play MvsL as you normally would. If you do not have access to two flashcards, then you have two, more difficult, options remaining Your first option is to try and use a hacked NDS firmware that bypasses Download Play's signature check Download firmware.nds and put it on your flashcard. Open this ROM on the DS you will launch Download Play from. Now, eject the flashcard from the DS you just ran the ROM on. (This will not cause your DS to freeze) Finally, put the flashcard back in the other DS. Once you have done this, you can run the ROM of the MvsL hack and select “Play with someone who doesn't own New Super Mario Bros” If the firmware ROM does not work on your flashcard, try this one instead. Your final option is to use normal DS Download Play with “DLP Mode” in NSMBe 5 Open a clean (unedited) ROM Open it in NSMBe After you open the ROM, go to Tools and check “Enable DLP-friendly mode” Now, you can make whatever changes you want to the ROM When you're done, you can play with another DS through DS Download Play like you normally would using the “Play with someone who doesn't own New Super Mario Bros” option If the game hangs at the Nintendo logo, you might have missed a step. Double check you did everything and try again with another clean ROM If the DS freezes with a black screen after you select a level it can mean one of two things: Your flashcard is not compatible with this method. Some flashcards don't like firmware.nds. Try using firmwarefix.nds instead. There's something wrong with the level that is making the game freeze My level crashes, what do I do now? If you are not using any Code Hacks, then here are some things to consider Have you changed any object banks? This causes MvsL to crash so you need to change the object banks back to whatever the level had originally. Double-check that you are not using an object that has been confirmed to crash MvsL. There is a table later on this page that shows what objects are compatible with MvsL. Have you changed the number of Battle Stars that are in the level? Changing the number of Battle Stars in a level can cause MvsL to crash, and you will need to restore the original amount of Battle Stars the level had. My level crashes, but I'm using Code Hacks! Even with Code Hacks, not all objects work in MvsL. Take a look at the table at the end of the page to see if all of the objects you're using are compatible with MvsL. My level makes us de-sync, what's going on? Because of the nature of how multiplayer works in this game, the Random Number Generator seed is only synchronized once when the connection is established. Only inputs are sent from one console to another, so the code must account for both player actors. If code does not account for each player, the games will become de-synced. For example, if an enemy was coded to imply get the values of a player on the local console, it will read different data on each console. This causes the enemy to act differently on each DS, thus causing a de-sync. Implementation example: // Enemy reads only the position of its own console player playerPositionX = Game::getPlayer(Game::localPlayerID)->position.x; // Now the position that was read is different between both consoles // for this enemy and he will behave differently for each console! // This is very bad! // A solution would be to get the position of the closest player playerPositionX = enemy->getClosestPlayer(nullptr, nullptr)->position.x; // This way, it gets the closest player instead of its console player Object Compatibility (Vanilla) These objects will work in MvsL regardless of if you are using code hacks Most of the objects in this list are objects that are already used in MvsL Object ID Actor Name 23 Pipe Piranha Plant (Facing up) 24 Pipe Piranha Plant (Facing down) 25 Pipe Piranha Plant (Facing right) 26 Pipe Piranha Plant (Facing left) 27 Bill Blaster (Bullet Bill launcher) 28 Bob-omb 71 Stonewall moving up & down 72 Stonewall moving left & right 95 Spin Block 148 Goomba 149 Koopa Troopa 210 MvsL Big Star Object Compatibility with Code Hacks This spreadsheet is based on the nospritesetlimitation.s code patch To fix liquids in MvsL, use mvslLiquidFix.cpp There are 4 kinds of compatibility Works : This object completely works in MvsL Partial : Some parts of this object do not work in MvsL. The notes column will mention what doesn't work N/A :  The object does not load but it also does not crash the game Crash: The object crashes the game when loaded. See the notes for possible workarounds. Object ID Object Name Compatibility Notes 0 Crash Object (Player Actor) Crash Needs the clone code hack 1 Crash Object (Player Actor) Crash Needs the clone code hack 2 Crash Object (Player Actor) Crash Needs the clone code hack 3 Crash Object (Player Actor) Crash Needs the clone code hack 4 Crash Object (Player Actor) Crash Needs the clone code hack 5 Crash Object (Player Actor) Crash Needs the clone code hack 6 Crash Object (Player Actor) Crash Needs the clone code hack 7 Crash Object (Player Actor) Crash Needs the clone code hack 8 Crash Object (Player Actor) Crash Needs the clone code hack 9 Crash Object (Player Actor) Crash Needs the clone code hack 10 Nothing N/A Technically works due to it being nothing 11 Nothing N/A Technically works due to it being nothing 12 Nothing N/A Technically works due to it being nothing 13 Nothing N/A Technically works due to it being nothing 14 Nothing N/A Technically works due to it being nothing 15 Nothing N/A Technically works due to it being nothing 16 Nothing N/A Technically works due to it being nothing 17 Nothing N/A Technically works due to it being nothing 18 Nothing N/A Technically works due to it being nothing 19 Nothing N/A Technically works due to it being nothing 20 Defunct Actor 22 N/A If using the Actor Spawner code hack it works 21 Mega Goomba Works If using Boss Particle code hack 22 Hammer Brother from map N/A MvsL is missing a world map so... 23 Pipe Piranha Plant (facing up) Works   24 Pipe Piranha Plant (facing down) Works   25 Pipe Piranha Plant (facing right) Works   26 Pipe Piranha Plant (facing left) Works   27 Bill Blaster (Bullet Bill launcher) Works   28 Bob-omb Works   29 Princess Peach Works   30 Monty Tank Works If using Boss Particle code hack 31 Cheep Cheep Works   32 Goal Pole's Flag Works   33 Trampoline (portable springboard) Crash   34 Red Ring Crash   35 Final Bowser Controller Crash   36 Thwomp Works   37 Spiny Works   38 Boo Works   39 Castle boss controller Partial Some of the options crash the game, you can use a switch instead. 40 Lakitu (unused object) Works   41 Bowser bridge switch Works Loads, but graphics are not loaded correctly 42 Chain Chomp/Log Works   43 Chain Chomp (unused object) Works   44 Fire Snake (unused Actor 46) Works   45 Respawnable Hidden Block Works   46 Event controller - activates Spiked Ball when touched by Snake Block Works   47 Lakithunder Works   48 Aquatic bubble current (up) Works   49 Aquatic bubble current (down) Works   50 Aquatic bubble current (right) Works   51 Aquatic bubble current (left) Works   52 Buzzy Beetle Works   53 Dry Bones Works   54 Lava Bubble (Podoboo) Works   55 Bullet Bill Spawner Works   56 Fire Bar Works   57 Coin Works   58 Bowser Works   59 Hammer Brother Works   60 Nothing N/A Technically works due to it being nothing 61 Nothing N/A Technically works due to it being nothing 62 Big Bowser (unused object) Works   63 Dry Bowser Works   64 Whomp Works   65 Cheepskipper Works   66 P Switch Works Graphics are not loaded correctly 67 Sushi (shark) Works   68 Lift moving up and down Works   69 Lift moving left and right Works   70 Rotating log lift (unused actor) Works   71 Stonewall moving up and down Works   72 Stonewall moving left and right Works   73 Wobbly metal lift Works   74 Wobble Rock Works   75 Seesaw lift Works   76 Scale lift Works   77 Flimsy Lift (falls once touched) Works   78 Lift moving one way once stood on Works   79 Three-platform rickshaw lift (rotates in place by self) Works   80 Lift spawner Works   81 Nothing N/A Technically works due to it being nothing 82 Rotating rectangle lift Works   83 Self-activating block Works   84 Zoom Works   85 Flip fence (duplicate object) Works   86 Rotating triangle lift Works   87 Nothing N/A Technically works due to it being nothing 88 Brick Block containing P Switch Works P-Switch graphics are not loaded correctly 89 Snailicorn Works   90 Wiggler Works   91 Track-controlled lift Works   92 Unagi (eel) Works   93 Arrow signboard Works   94 Swooper Works   95 Spin Block Works   96 Seaweed Works   97 Nothing N/A Technically works due to it being nothing 98 Camera vertical scrolling N/A   99 Four-platform rickshaw lift Works   100 Vertical camera offset (unused actor) N/A   101 Event controller - view enter Works   102 Spiked Ball Works   103 Dorrie Works   104 Tweester (Tornado) Works   105 Whirlpool Works   106 Red Coin Crashes   107 ? Switch Works Graphics are not loaded correctly 108 ! Switch Works Graphics are not loaded correctly 109 Amp Works   110 Brick Block containing !-Switch Works !-Switch graphics are not loaded correctly 111 Floating log Works   112 Nothing N/A Technically works due to it being nothing 113 Cheep Chomp Works   114 Burner (Small) Works   115 Large Spiked Ball Works   116 Skeeter (Water Bug) Works Causes a desync however 117 Map Flying ? Block N/A   118 Burner Works   119 Swinging lift (pendulum-like) Works   120 Grounded Piranha Plant Works   121 Nothing N/A Technically works due to it being nothing 122 Big Grounded Piranha Plant Works   123 Grounded Fire Piranha Plant Works   124 Large grounded Fire Piranha Plant Works   125 Defunct Actor 229 N/A   126 Drawbridge lift Works   127 Big four-platform rickshaw lift Works   128 Warp Cannon Works   129 Boss Key Location Works   130 Jumping Cheep Cheep Works   131 Checkpoint - vertical Works Does the animation but doesn't set anything 132 Checkpoint Works Does the animation but doesn't set anything 133 Nothing N/A Technically works due to it being nothing 134 Nothing N/A Technically works due to it being nothing 135 Nothing N/A Technically works due to it being nothing 136 Pokey Works   137 Nothing N/A Technically works due to it being nothing 138 Nothing N/A Technically works due to it being nothing 139 Nothing N/A Technically works due to it being nothing 140 Boss Key Works   141 Swelling ground Works   142 Tightrope Works   143 Spiked ? Block (unused actor 251) Crashes   144 Spiked ? Block Crashes   145 Spiked ? Block (unused actor 253) Crashes   146 Ground-pound panel Works   147 Bump from below platform Works   148 Goomba Works   149 Koopa Troopa Works   150 Koopa Paratroopa Works   151 Nothing N/A Technically works due to it being nothing 152 Event trigger block Crash   153 Nothing N/A Technically works due to it being nothing 154 Nothing N/A Technically works due to it being nothing 155 Special exit controller (warp entrance) Crash Sometimes just corrupts graphics and does nothing 156 Nothing N/A Technically works due to it being nothing 157 Fire Brother Partial Causes a desync 158 Boomerang Brother Partial Causes a desync 159 Nothing N/A Technically works due to it being nothing 160 Nothing N/A Technically works due to it being nothing 161 Nothing N/A Technically works due to it being nothing 162 Mushroom Platform lift Works   163 Nothing N/A Technically works due to it being nothing 164 Event controller - "AND" Works    165 Event controller - "OR" (If X OR Y, do Z) Works   166 Event controller - "RANDOM" Works   167 Event controller - chainer (If X, do Y) Works   168 Event controller - "IF" (uses zones) Works   169 Spin Block (unused Actor 255) N/A Doesn't spawn 170 Nothing N/A Technically works due to it being nothing 171 Spin Block (unused Actor 256) N/A Doesn't Spawn 172 Nothing N/A Technically works due to it being nothing 173 Swinging/able rope Works   174 Mushroom Platform lift Works   175 Bouncy bricks (Unused) Works   176 Nothing N/A Technically works due to it being nothing 177 Nothing N/A Technically works due to it being nothing 178 Nothing N/A Technically works due to it being nothing 179 Nothing N/A Technically works due to it being nothing 180 Climbing Koopa Works   181 Nothing N/A Technically works due to it being nothing 182 Nothing N/A Technically works due to it being nothing 183 Lakitu spawner Works   184 Nothing N/A Technically works due to it being nothing 185 Cheep Cheep random spawner Works   186 Paragoomba Works   187 Balance lift Works   188 Nothing N/A Technically works due to it being nothing 189 Pipe Cannon Works Desynchronizes the game 190 Nothing N/A Technically works due to it being nothing 191 Hanging Bouncing ? Block Works   192 Coin Spawner (unused actor) Crash   193 Big Dry Bones Works   194 Big Thwomp Works   195 0 Stick to bottom length activator left Works   196 0 Stick to bottom length activator right Works   197 Tile Creator/Destroyer (Tile God) Crash   198 In air vertical scroll stop left N/A   199 In air vertical scroll stop right N/A   200 Nothing N/A Technically works due to it being nothing 201 Nothing N/A Technically works due to it being nothing 202 Nothing N/A Technically works due to it being nothing 203 Unused Purple Mushroom Platform Lift Works   204 Fire Snake Works   205 Flame Chomp Spawner Works   206 Ghost house goo Works   207 Big Cheep Cheep Works   208 Nothing N/A Technically works due to it being nothing 209 Sledge Brother Works Causes a desync however 210 MvsL Battle Star Works Who would've thought 211 Blooper Works   212 Blooper Nanny (unused actor 144) Works   213 Blooper Nanny that w/ Baby Bloopers Works   214 Nothing N/A Technically works due to it being nothing 215 Nothing N/A Technically works due to it being nothing 216 Nothing N/A Technically works due to it being nothing 217 Nothing N/A Technically works due to it being nothing 218 Auto-scrolling controller Works If the players spawn in the same position after respawning it stops working 219 Spike Top Works   220 Bowser Jr. Works   221 Nothing N/A Technically works due to it being nothing 222 Mini Goomba Works   223 Flip fence Works   224 Big flip fence Works   225 Nothing N/A Technically works due to it being nothing 226 Scuttlebug N/A   227 Moneybag Works   228 Roulette Block Crash   229 Petey Piranha Works   230 Nothing N/A Technically works due to it being nothing 231 Water Works   232 Hanging ? Block Works   233 Swinging/able pole Works   234 Lava Partial Causes a desync is not using mvslLiquidFix.cpp 235 Star Coin Crash   236 Rotating square lift Works   237 Broozer Works   238 Purple Mushroom Platform lift Works   239 Yellow/Orange Mushroom Platform Works   240 Nothing N/A Technically works due to it being nothing 241 Bill Blaster Turret Works   242 Blue Mushroom Platform Works   243 Roof Spiny Works   244 Bouncy Mushroom Platform Works   245 Corked Pipe + foot pump Crashes   246 Floating barrel Works   247 Sushi spawner (shark spawner) Works   248 Balloon Boo Works   249 Track-controlled wall-jump lift Works   250 Crowber Works   251 Big Unagi Crash   252 Banzai Bill Blaster Works   253 Nothing N/A Technically works due to it being nothing 254 Kab-omb Works   255 Jungle FG Effect (Unused Actor) Works   256 Rotating carry-through-wall turntable-like lift Works   257 Coin trail Cheep Cheep Works   258 Spike Bass (unused object) Works   259 Poisoned Water Partial Causes desync if not using mvslLiquidFix.cpp 260 Fast Spike Pillar - Down Works   261 Fast Spike Pillar - Up Works   262 Fast Spike Pillar - Left Works   263 Fast Spike Pillar - Right Works   264 Mega Ground Pound's sky drops + Crash   265 Phantom Hand (Pointing hand) Works   266 Invisible Lava Bubble (unused actor) Works   267 Nothing N/A Technically works due to it being nothing 268 Underwater bounce bubble Works   269 Giant Wiggler Works   270 Smashed pipe object Works   271 Crowber spawner Works   272 Snowy branch Works   273 Snow Spike Works   274 Sinking-snow pile Works   275 Blockhopper Partial Desyncs 276 Scroll and Mario stop sideways Works   277 Arrow sign Works   278 Groundpound-able ghost house goo Works   279 Flipper (one-way gate) Works   280 Horizontal camera offset N/A Not sure how this object works 281 Squiggler Works   282 Swinging/able vine Works   283 Spike Bass spawner Works   284 Splunkin (pumpkin) Works   285 Scuttlebug spawner N/A   286 Event controller - multi-chainer Works   287 Enemy-in-Pipe Generator Works   288 Nothing N/A Technically works due to it being nothing 289 Platform Block (expandable block) Works Doesn't respawn if it turns into bricks and you collect a battle star. 290 Flying ? Block Crash Black screen 291 Brick Block containing ? Switch Works ? Switch graphics are not loaded correctly 292 Event Activated Door Works   293 Touching ground vertical scroll stop left Works   294 Touching ground vertical scroll stop right Works   295 Mummipokey Works Use a P-Switch 296 Lift moving left and right Works   297 Stonewall moving left and right Works   298 Stonewall moving u, d, l, r Works   299 Snake Block Works   300 Haunted lift Works   301 Toadsworth Works Only freezes Mario for a few seconds, and Luigi can roam freely. Background chooser will break because of BMG differences. 302 Toad House block Doesn't work Garble graphics. 303 Ball 'n' Chain Works   304 Spike Pillar - down Works   305 Final Castle Create Loop N/A I have no idea how this works. 306 Final Castle Wrong Path N/A I have no idea how this works. 307 Spike Pillar - up Works   308 Spike Pillar - left Works   309 Spike Pillar - right Works   310 Fog FG effect Partial Graphics are not loaded correctly 311 Snow FG effect 1 Works   312 Rise or lower while/once on Mushroom Platform lift - mechanical Works   313 Snow FG effect 2 Works   314 Snow FG effect 3 Works   315 Cloud FG effect Partial Graphics are not loaded correctly 316 Water FG effect 1 Works   317 Water FG effect 2 Works   318 Fire FG effect 1 Works   319 Fire FG effect 2 Works   320 Fire FG effect 3 Works   321 Light FG Effect 1 N/A   322 Light FG Effect 2 Works   323 Squishy cloud platform Works Both players can interact with it at the same time 324 Grassland Clouds FG effect Partial Graphics are not loaded correctly 325 Small Grassland Clouds FG effect Partial Graphics are not loaded correctly