List of Super Smash Bros. for Wii U glitches
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This is a list of glitches in the game Super Smash Bros. for Wii U.
During any game when the side taunt is performed, there is a chance it will do the down taunt instead. This currently only happens on the Gamepad.
Drifting Pac-Man (removed in Version 1.0.1)
In a match, while playing as Pac-Man, if one pauses the match while he's charging his Side Smash, Pac-Man starts drifting in a random direction, even passing through parts of the stage as they drift. However, unpausing the match puts Pac-Man back in his position as if nothing happened. 
Floating Yoshi Egg
In the Mushroom Kingdom U stage if Yoshi loses his last stock during the stage transformation he can get stuck in a floating egg. When the stage transforms again it will disappear. The details of this glitch are still unknown. 
If the player quits the game using the Home button and choose to returning to the Wii U Menu, the screen "Wii U menu" sometimes remains on screen and the Wii U Menu never appears, forcing the player to turn off the Wii U with the power button.
Yoshi Egg Inside Nabbit
In the Mushroom Kingdom U stage if Yoshi loses his last stock he can get stuck inside of Nabbit. The egg will stay inside of Nabbit until he leaves the stage.. This glitch is still not fixed yet in the patch .
Bowser Jr. Teleport
This happens on the Battlefield stage, if Bowser Jr. uses his up special and gets KO'd shortly after the Junior Clown Car respawns. He will start teleporting when moving and dodging, and his moveset and ledge grabbing will move awkwardly.
Lucas' PK Freeze Outside of the Stage Glitch
This glitch is only works on Lucas doing PK Freeze outside of the stage far away and the glitch will trigger Lucas getting stuck in his PK Freeze pose. This glitch is still recently not fixed yet in the patch and works on the Nintendo 3DS version also. 
Sometimes there is a Hitbox error when the player is attacking another. It seems common with an example of Pikachu's up special, as the player will sometimes attack where Pikachu was about half a second ago, and Pikachu will be damaged.
Two Pac-Mans doing Trampoline not getting KO'ed off screen glitch
It's a glitch that on works on having two players select Pac-Man in the same team, the glitch only works if using two Pac-Man uses the Trampoline special move together, it will not trigger both of the Pac-Mans to get Ko'ed off the screen, but the trick to get rid of KO two Pac-Mans performing the same glitch by using R.O.B. using the Gyro special move hit one of them in the air. This glitch counted as cheating through playing on battle with someone in team battle like in Online Multiplayer and Smash Mode.
8 Players with 1 controller
This glitch works on 8 Player Smash and has Player 1 control more than 1 fighter at a time, from 2 to all 8 fighters. The glitch requires 1-7 Amiibo and can be done with multiple controllers. The player should assign their controller to the first slot, then set the slot to display none. The player should desync the controller, then scan an amiibo with the gamepad. The player should sync the controller back. They will have control of the second slot. The steps can be repeated until 7 slots have amiibo and the eighth slot is occupied by the player. The player should then go to change the rules. After they exit, they will have control over multiple cursors, and can select characters from that point.
Characters with Final Smash Transformation in Victory Screen glitch
This glitch only works on Bowser, Wario, Lucario, and Little Mac. While using their Final Smash, transforming to Giga Bowser, Wario-Man, Mega Lucario, and Giga Mac appeared at in the Victory Screen. This glitch only works by having them transform, and don't get them to win during when the match ended on Time Battle, and the glitch requires to have the Smash Ball broken before the Announcer says "Time", and get it to transform midway right at the end. And Bowser, Wario, Lucario, or Little Mac will appear on the Victory Screen .
Toad Counter Attack + Franklin Badge glitch
It's a glitch that on works on Ness and Peach, the glitch only works if Peach equipped the Franklin Badge and use a counter attack with Toad on Ness with the Side Smash Attack that it can cause more spores out of Toad and it can get Ness a 212% damage and get an one hit KO. This glitch is still recently not fixed yet in the patch. 
Victory T-Pose Glitch (removed in Version 1.1.0)
This glitch can only be performed by a player press the Home Button during the battle is over during in the "Game" screen in a split second and the Victory Pose will appear in T-Pose. The 1.1.0 patch fixed the glitch by adding the No Home Menu Icon during in the "Game" screen.
"The Force" Grab Glitch
On the Town and City stage, when the player is on a moving platform and grabs another character on a different moving platform, the opponent moves away, but the player is still grabbing them. The player can still use their grab attack but they will be hitting nothing. Throwing the grabbed character still works.
Diddy Kong Immune Grab Glitch (removed in Version 1.1.2)
It's a glitch that on works on Diddy Kong with pressing the shield while the opponent hit Diddy Kong with the shield up more than once and then, let go the shield button and get Diddy Kong hit twice will get Diddy Kong will not get grabbed by any opponents (along with any other fighter like Wario's Chomp, Kirby's & King Dedede's Inhale, and Yoshi's Tongue will not grabbed Diddy Kong while he's in the glitch state). The glitch will disappear during in the battle can be done getting Diddy Kong by being KO'ed. This glitch was recently added in the recent 1.1.1 patch and has been fixed in the 1.1.2 patch. 
Coal Black Colored PK Freeze Glitch
This glitch can only be done with R.O.B. while Lucas or Ness use PK Freeze. The player should hold Smash Attack Down before triggering the PK Freeze hit. The color of the ice will appear slightly different depending on the color pallete of R.O.B. This glitch was found in the recent 1.1.2 patch and has not been fixed. 
Lylat Cruise Optical Illusion