List of Super Mario 3D World glitches
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This is a list of glitches in the game Super Mario 3D World.
NOTE: All names are conjectural unless otherwise specified.
Air Jump Glitch
In the level A Beam in the Dark, there is a section where the player can enter a specific door. Because this door has no platform under it, it should lead to the player to fall back down. However, the player jumps as soon as he leaves the door, he will be able to jump in the air as if there was a platform.
Baddie Box Sound Glitch
Camera Angle in Super Bell Hill Glitch
In Super Bell Hill near the end of the level if the player has the Cat Suit they can get onto the other side of the fencing. They will need to continuously run up to avoid falling off and they will need to move around the fencing. When they reach the other side of the fencing the camera will continue to pan down, after a few moments it will go back to the player.
Cannon Box Glitch
The player should go into a level where there are Cannon Boxes with Cat Toad, and dive into a Cannon Box. Toad's head should then disappear. When Toad grabs another power-up, a Cannon Box will show but it won't move with him.
Cat Dive Speed Glitch
While in cat form, if the player dives, cancel it before hitting the ground, then jumping, and repeat the process will make players gain speed. The player can stop the glitch by failing to do it.
Deepwater Dungeon Madpole Glitch
In Deepwater Dungeon, if the player freezes one of the two Madpoles with the Wii U Gamepad in the beginning where the water moves up and down, then when they are released they will automatically disappear and reappear at the top of the water.
Float With Koopa Shell Glitch
In Koopa Troopa Cave, if the player holds a Koopa Shell, jumps and traps it into a cloud the player will get stuck and appear to be floating. If they get stuck in the descending clouds, the player will lose a life because they are uncontrollable.
In the same level, at the beginning after the first Clear Pipe the player has to break one of the blocks that lead down. Then the player has to pick up a Koopa Shell and drop down where the gap is. The player will get stuck.
Float With Koopa Shell Glitch 2
The player must be Luigi or Rosalina and hold a koopa shell. Then they must jump in a tight spot and will appear to float, but only for a short time.
Go Inside Captain Toad's Level
If the player completes a Captain Toad level, exits the game, and opens it back up, the player can go through the preview of Captain Toad's level.
Inside the Floor Glitch
In Trick Trap Tower where the flag pole is, if the player has a cat suit, jump on the left side of the tower, and return doing a Cat Dive, the player will get inside the floor. The glitch ends if the player jumps.
Long Jump Glitch
Out of Bounds Glitch 1
The player needs a Tanooki Suit in the store box and should have a Cat Suit. They then need to go to Mount Beanpole or Spiky Mount Beanpole, then they should go up to the very top of the mountain. Then they need to take out the Tanooki Suit in the store box and do the Cat Dive Momentum Glitch. If they keep holding down on the control stick they'll fly out of bounds. The player can only get out of this glitch by waiting until the time goes out. If the player goes too far, the background will start duplicating frames of objects on the screen, resulting a screen artifact.
Out of Bounds Glitch 2
The player needs to go to Snowball Park, they then have to grab a Propeller Box and run to the end of the ice path with the Para-Biddybuds and jump off it and fly towards where the level goes, the player will go off the screen, but not die.
Secret Room 1
The player needs to go to Towering Sunshine Seaside with the Cat Suit and go to where the Goomba Tower with the third Green Star and jump onto the building and climb to the top of it. At the top of it the building has no roof and the player can go into it, however they are unable to leave it. The camera will occasionally go into the building. Also, if the player manages to get to the other side of the "invisible roof", there will be an invisible path. This also can be done in the Sunshine Seaside, but the camera will not follow the player.
Skip Meowser Cutscene
In order to perform this glitch, the player must be playing as Peach in the level The Great Tower of Bowser Land. The player must have a Cat Suit with a Tanooki Suit in storage. The player must advance to the ramp before the sliding platform that leads to Meowser. The player must align in between the 4 tiles in the 4th column, starting after the ramp. The player must throw the Tanooki Suit out and leave it there. Then, the player should proceed to slide in the opposite direction of the Super Leaf, go back, jump above it, and perform the Cat Dive Cancel exploit to gain speed. Then, the player should slide down the ramp, jump at the very end, cat dive back into the ramp, jump, float, grab the Tanooki Suit in mid-air, and float to the left of the blue platform around the platform that leads to Meowser. The player must let go of the float button right before landing on the very edge of the blue platform, and then, he or she should jump in order to maintain momentum.
As the player is floating to the east of the bridge after performing the jump, the player must try to align with a black bar at the side of the tower. This is not necessarily required, but is a good visual cue. If the player gets close enough, the cloud platforms will start appearing in the distance. The player must head into the direction of the clouds, as it will make Peach land onto the autoscroller section, skipping a small chunk of the level as well as the cutscene.
This trick, however, can result in the loss of a life if done incorrectly. Doing the last section incorrectly will result in the game thinking the player is still on the platform leading to the bridge, but outside the boundaries of where the game expects the player to be. This results in a major camera shift, which often results in Peach losing a life. A good visual cue is the camera angle; if the camera moves too much and obstructs the player's view, then the player has done the trick incorrectly and will lose a life. If the camera moves only slightly and still allows the player to see Princess Peach, then the trick has been done correctly. Doing this glitch prevents any music from playing during the climb through the tower.
Snowball Separation Glitch
In World 3-1, try to make snow balls get right next to each other. If done correctly, the two snowballs will somehow move away from each other.
Stuck Bouncing Glitch
Spinning after exiting the pipe before a Boss Cutscene during 4 Player Games can cause the player to become stuck bouncing on another player's head, unable to move and land to begin the cutscene. 
Super Speed Exploit
If the player repeatedly taps the crouch button on ice or other slippery surfaces, their speed will increase dramatically, and the momentum can be continued by jumping forward or repeating the glitch. 
Tanooki Gliding Glitch
Transform Items Glitch
Sometimes, if two items overlap, the item transforms into a new one (i.e. if the player puts a Super Bell on a Super Leaf, they will get a Super Mushroom). If players are using a Lucky Bell and overlap a Fire Flower on a Tanooki Leaf, they will get a Fire Flower as the power-up and also will receive an extra Fire Flower. This glitch can be done with all power-ups. The results depends on the combination of the power-ups. However, if the player gets any item to overlap an Invincibility Leaf, the item in the inventory will clone itself.
Unactivated Enemies Glitch
Sometimes, when a player takes a shortcut, certain enemies will not attack. This is because the game relies on the player to step on a certain trigger to activate the enemies, so when the trigger is skipped, the enemies will not attack. They can still cause damage when touched, and can still be defeated.
Wind Blow Glitch
Just before the timer counts down after getting the flagpole, If the player blows on the mic on the Wii U Gamepad, the sound of the wind won't stop until the score screen comes up.
World Map Jump Glitch
On the World Map, if the leading player jumps and enters a Captain Toad course before touching the ground again, the player will remain in the air until the course screen wipe.
World Map Out of Bounds
If done correctly, one can get on top of the World Bowser entering pipe by jumping, and then fall to the worlds down below. Additionally, if the player quits the game while he/she is falling out of bounds, the saved progress will not be saved, and when restarting the game, the music of the world the player was in when the glitch was activated plays for a short time.