The Nintendo 3DS version of this game is the only entry in the Super Smash Bros. series that lacks an opening cutscene once it is booted, which was likely done to save space on the game cartridge.

A potential stage based on Super Mario Land was considered for the Nintendo 3DS version to represent the Game Boy. However, a stage based on Kirby's Dream Land was used instead for unknown reasons (the stage was renamed to Dream Land GB in Super Smash Bros. Ultimate to avoid confusion with another stage already named Dream Land).

A reversal of this kind also happened in the Wii U version, where a stage based on Kirby's Epic Yarn was considered, but was replaced by a stage based on the then-upcoming Wii U game Yoshi's Woolly World.

While battle damage is used for Little Mac in the Wii U version, data suggests that other characters were planned to have similar effects. This can be seen in unused textures for R.O.B. in the game's data which seem to show battle damage. This is a remnant to Super Smash Bros. Brawl in which characters were also planned to have battle damage, but were left out.

The Pirate Ship stage from Super Smash Bros. Brawl was only included in the Wii U because of technical limitations of the 3DS.

Xander Mobus, the game's announcer, has stated that he had difficulty pronouncing Jigglypuff's Japanese name, Purin.

In the sound test section, there are unused audio clips for both versions of Corrin screaming when taking a high-knockback hit.

In the Sound Test is one of Rosalina's voice clips from Mario Kart 7. This could've been used for her generic attacks, but it is unused.

In the Sound Test is Wario's groggy moan which was used in Super Smash Bros. Brawl when his Final Smash ends. Despite this, the audio is otherwise unused in this entry.

In the game's files is a very brief beep sound. This same audio clip is also in the files in Kid Icarus: Uprising.

In the 3DS version's files is the Forest Stage theme from "Kirby Air Ride." This song would later be used for the Dream Land (64) stage on Wii U.

In an interview with Nintendo Dream, Masahiro Sakurai stated that the reason why Ness and Lucas's final smashes, PK Starstorm, function differently from their Brawl counterparts was due to limitations in the 3DS hardware.

Yoshi does not make any noise upon using his "Yoshi Bomb" down special. However, the voice clip can be found as Clip 22 in his section at the Sound Test.

In the 3DS version's files are unused models from the "Cook Kirby" Final Smash from Super Smash Bros. Brawl.

In the Wii U version’s files are unused animations containing Diddy Kong laughing.

In the Wii U version’s files are unused animations for when Giga Mac uses the attack for the KO Punch.

Inside the Wii U version's files are unused gliding animations for Meta Knight, Pit, and Dark Pit. This may suggest that gliding was supposed to return from Brawl. However, it's likely that it was cut for balance reasons.

There's a rare glitch in the WarioWare Inc. stage. In normal gameplay, "Ashley's Song" plays its Japanese version in Japan only, and the English version in all other versions. However, in Spectate mode, if Player 1 is from Japan and this stage is chosen, the game will play the Japanese version of the song regardless of region.

This is the only game, as of this writing, where Marth does not say anything upon using the Counter move. The sounds for Marth's Counter voice clips can be heard in the game's Sound Test.

Inside the Wii U version's files are the unused preview images from the 2007-2016 era characters (Rosalina, Wii Fit Trainer, Shulk, etc.) suggesting that the All-Star mode would've had the same order of the characters as the 3DS version.

For some strange reason, in the Spanish version of the Wii U game, the Temple stage is called "La Cúspide." "La Cúspide" means "Summit," and it's unknown whether the stage from Brawl would return, or just simply a translation mistake.

Some releases fixed this mistake, however, and the map is called "Templo" in those instances. (the correct Spanish name)

Inside the 3DS version's files are unused announcer clips for "Boss Battle," "Tourney," "Events," "Coin Battle," "Master/Crazy Orders," "Smash Tour," and "8-Player Smash," suggesting they may have been available for both versions. All of them except for Boss Battle would later be used for the Wii U version.

As for the 8-Player Smash, there is an announcer clip for "Yellow Team." However, because 8-Player Smash was cut for the 3DS version, so did the Yellow Team.

"Special Smash" can be heard in the Sound Test as voice clip 83 for the Announcer in the 3DS version.

There is an unused Announcer clip saying "Smash World," which may have been an early name for Smash Tour. Similarly, the Japanese name for Smash Tour is "World Smash."

Inside the 3DS version's game files is an unused sound for when you get a CD.

According to Masahiro Sakurai, in the November 2014 issue of GameInformer, the reason why both versions were released at different times was done to "keep the debugging schedules separate from each other:"

"The biggest reason was so we could keep the debug schedule separate from each other. Debugging a game this size is a major project involving hundreds of people, and since the two platforms offer pretty different content, we wanted to avoid conflicts during the debug stages. If we were hell-bent on a simultaneous day-and-date release, we would have wrapped up one title, put it on the back burner, and launched both games in 2015. But I doubt most people prefer that."

According to Masahiro Sakurai, in the November 2014 issue of GameInformer, the reason why Super Smash Bros. was released on two different consoles was because he was a “freelance game designer,” and that having a unique version of the game makes it fun.

"The first reason is that I think both portables and home consoles have their own traits that make them fun. I've gone into that in previous interviews, so I'll omit the details here.

One big reason for this approach is because I'm a freelance game designer ... I'm always going to be the center of any Smash Bros. project, but since I don't have my own personal studio, the staff changes in and out with each project. Changing development studios like this also means that you can't build out from the know-how and in-house assets you've accumulated over time.

As a development environment, it's different from a publisher that can work on fighting games, shooters, and open-world titles all at once. For us, even if things look the same, it's all completely different, completely built from scratch. If we started with a console project then moved on to the portable platform, once one team finished up their work, we'd have to wait and hand everything over to another team."

Underneath Link's hat, you can see fully modeled hair that cannot be seen under normal circumstances.

The emulated NES demos featured in the "Masterpeice" collection seem to run NES games at a higher quality than the actual Virtual Console versions they are promoting. This is most evident in how smooth and clear these demos look against the comparatively blurry VC ports.

This is likely due to Nintendo's improved emulation abilities rather than them purposefully trying to mislead fans, as the NES Virtual console was released very early in the Wii U's lifespan and likely used a system similar to that of the Wii.

Smash Run mode was originally going to have cooperative gameplay but the idea was dropped due to the 3DS's limitations.

In the Japanese version, Wonder Pink's trophy had a different pose, and her legs and underwear were shaded to make it appropriate for the CERO rating.

The game contains unused sounds of Kirby saying "Heavenly Light" and "Explosive Flame", both of which are Palutena's custom Neutral Specials.

On page 292 of the Prima Guide for Super Smash Bros. 3DS / Wii U, it shows a beta image of the roster containing the Mii Brawler icon. Although the individual Mii fighters do not have their own icons in the final game, the unused icons for the Brawler as well as the Mii Swordfighter and Mii Gunner can still be found in the game's data.

The game contains an unused costume selection for Roy, which uses his default color palette without his cape and comes with a number of minor texture differences.

In the June 14th, 2015 Direct, Sakurai stated that the Suzaku Castle stage was the first in the series to have music that changes as the timer gets close to zero. This is false, as the Mushroom Kingdom stage of Super Smash Bros., and the Mushroom Kingdom and Mushroom Kingdom II stages of Super Smash Bros. Melee all have music that changes as the timer gets close to zero.

The reveal trailer for Roy shows him taunting in front of the Spicy Curry item. This is actually a reference to a Japan-only Super Smash Bros. Melee photo contest. The winner was a photo called "The Ultimate Curry", which depicted Roy taunting in front of the Curry food item.

The image of Mario and Luigi carrying gifts for Bayonetta is a possible reference to Bayonetta 2, in which Enzo carries Bayonetta's gift boxes in the game's opening cutscene.

If Little Mac accrues 100% of damage during a match, bruises and tape will appear on his face.

Despite R.O.B. having his grey and white palette in the American version instead of his red and white palette, his Final Smash trophy shows him with his Famicom color palette no matter what version of the game is being played.

There is an unused Game Over jingle leftover in the game's files. The song is not used anywhere in the game.

In the Wii U version, there is unused text that says:



This most likely meant the Temple and Gamer stages were going to be unlockable stages at one point.

The match end tune from Street Fighter II can be found in the game's files. However, a remix of this tune was used instead for Ryu's win theme. The unused tune was most likely a placeholder during development.

Corrin from Fire Emblem Fates nearly didn't make it into the game because Super Smash Bros. creator Masahiro Sakurai thought that they had already included too many Fire Emblem characters.
However, Sakurai's team thought that Corrin would be a unique fighter and convinced him to include the character in the game.

According to Masahiro Sakurai, in an interview with Famitsu, the reason for the addition of the fighter Duck Hunt was for two reasons. The first reason was that he had an interest on adding them for a long time, but was also because of the uniqueness of the character. The second reason was because of the high sales of the game, and he deemed that the game was the high-selling shooting game in the USA.

The Epona trophy is taken from the 3DS release of Ocarina of Time, rather than the original Nintendo 64 release.

In the game's files for Mario Circuit is textures for Toads Kart and Toad himself, this suggests that Toads would of raced instead.

In the Taiwan and Hong Kong websites of the Super Smash Bros. for Nintendo 3DS websites, one of the photos is actually taken from the Wii U version. The Wii U version was not released in Taiwan or Hong Kong yet, and was likely just an oversight of the developers.

The promotional artwork for Ryu is a reference to the Street Fighter 2 World Warriors arcade artwork.

An alternate version of Kirby saying "Hi!" for his down taunt can be found in the game's files. This version sounds closer to the ones heard in previous games than the one used in the final game.

Because the 3DS needed third party support when it was first released, Nintendo appreciated Namco's efforts on Tekken 3D: Prime Edition, and the two companies became closer. This eventually led to Namco Bandai assisting Nintendo in developing Super Smash Bros. for Nintendo 3DS and Wii U.

Super Smash Bros. 4 is the first game in the Super Smash Bros. series where Falco is not unlocked by completing 100-Man mode. This condition was instead given to Wario.

It was considered to make Alph a clone of Olimar with the ability to use Rock Pikmin. However, this idea was scrapped and Alph became a costume swap instead.

According to Masahiro Sakurai in an interview, Pac-Man would have been removed from the roster if Bandai Namco had rejected his redesign of the character with a more classic Pac-Man appearance, as he considered it superior to the designs used in Pac-Man and the Ghostly Adventures.

Tekken's Heihachi was briefly considered for the roster, but was ultimately replaced with Ryu. The team thought that implementing Heihachi's movement into the game would have been difficult. He was given a Mii costume, however.

Lucario's Allstar Mode picture references the 8th Pokemon movie, Lucario and The Mystery of Mew. The picture has the Villager (in their 8th alternate outfit) offering Lucario some chocolate, in reference to a scene in the movie where Max offers Lucario some chocolate.

Tingle's trophy chronology only mentions his appearance in Majora's Mask. Which is odd considering Tingle's Wind Waker design is used for the trophy, and his role in Wind Waker is mentioned in the trophy's description.

Mewtwo's character art uses the same pose as the one in Super Smash Bros. Melee.

Takamaru was once considered as a possible playable character in Super Smash Bros. for 3DS and Wii U. According to Masahiro Sakurai, due to his low popularity, he was included as an Assist Trophy instead.

The texture for the Skull Kid assist trophy contains an unused portion which seems to be the flute he used in Ocarina of Time and Majora's Mask. It is unknown what it could have been used for, though it's likley he was supposed to use it in some way when the player summons him.

If the player reflects the Starman enemy's projectile, the "SMAAAASH!!" graphic from Earthbound will flash and the starman will be instantly killed.

The Super Smash Bros for Wii U game disc contains an unused character file simply titled "Rhythm". This could mean that a character from Rhythm Heaven was intended to exist in game, but was cut during development.

The game originally had a 4th set of custom moves for all characters. By hacking the game it is possible to activate them, although most of the moves are unfinished, and do not deliver damage.

The dollar bills that are collected in the Wii U's Coin Battle mode have an image of Nintendo's Japanese Headquarters printed on them, as well as a photo and signature of series creator/director; Masahiro Sakurai.

The only virtual console game that doesn't appear within the masterpieces menu in the International release of the game is "Fire Emblem: Shadow Dragon and the Blade of Light", as this title was never translated or released anywhere but in Japan.

In Super Smash Bros for Wii U the trophy titled "Hocotate Bomb" states that it appears in Pikmin and Pikmin 2 even though it appears in Pikmin 2 and Pikmin 3.

In Super Smash Bros for 3DS the trophy titled "Luigi (With Poltergust 3000)" is actually wrong. The Poltergust that Luigi is wearing is actually the Poltergust 5000 from Luigi's Mansion: Dark Moon, which can be noted by the green light on the back of it.

This is the first time both Master Hand and Crazy Hand have in-game announcer calls that are used.

Kongo Jungle is the only past stage from the original game to return, with the exception of DLC.

Some of the Boxing Ring Stage titles contain references and easter eggs.

Luigi's, "The Eternal Understudy", is a reference to his unlock screen in the original Super Smash Bros..

Fox's title in the European version "Never Gives Up! Trusts His Instincts!" is a reference to a line in Starfox 64 said by Peppy in the Asteroid Belt level (and later on said by Fox's father).

Kirby's European title "Gritty in Pink" is a reference to the movie "Pretty in Pink".

Sonic's European title "Speed is his Game" is a reference to one his popular quotes "Sonic's the Name, Speed's My Game!".

Pikachu and Jigglypuff's European titles are actually just their Pokedex names.

The Hyrule Temple stage has Hylian text written along many platforms that when translated to English reads "Smash Brothers". This was illegible in previous versions of the game.

Many of the Boxing ring titles were changed when the game was brought to the PAL Region:
• Mario: "Mr. Video Game Himself" became "Smashes Bricks with his Fist."
• Luigi: "The Eternal Understudy" became "Lean, Green Fighting Machine."
• Peach: "Princess of Toadstools" became "Princess of the Mushroom Kingdom."
• Bowser Jr.: "The Prince of Koopas" became "Like Father, Like Son."
• Larry Koopa: "The Youngest" became "Leader of the Seven Minions."
• Roy Koopa: "The Cool One" became "Fear the Shades."
• Wendy Koopa: "The Bold Beauty" became "Bold, Bossy, and Big-Headed."
• Morton Koopa: "The Enforcer" became "He'll Make You See Stars."
• Lemmy Koopa: "Wacky War Machine" became "Let's Get Wacky."
• Yoshi: "Omnivore of the Year" became "He's Not Yolking Around."
• Diddy Kong: "The Acrobat" became "Trigger Happy with His Peanut Popgun."
• Little Mac: "Bruiser from the Bronx" became "The Only Numbers He Knows Are 'One-Two'."
• Sheik: "The Illusive Sheikah" became "A Sheikah Shrouded In Mystery."
• Ganondorf: "The King of Darkness" became "The King of Evil."
• Toon Link: "Wind-Waking Warrior" became "Wave-Riding, Wind-Waking Warrior".
• Zero Suit Samus: "The Warrior Within" became "Low Armour, High Agility".
• Pit: "Captain of Lady Palutena's Guard" became "Lady Palutena's Captain of the Guard".
• Marth: "The Hero-King" became "The Legendary Hero-King."
• Ike: "The Radiant Hero of Legend" became "The Radiant Hero".
• Robin: "The Tactician Magician" became "The Tome-Toting Strategist".
• Kirby: "The Pink Puffball" became "Gritty in Pink".
• Duck Hunt (Duo): "Bark, Quack, Boom!" became "The Most Unlikely of Partnerships".
• King Dedede: "The King of Dream Land" became "Says He's King, and That's That".
• Fox: "Leader of Star Fox: became "Never Gives Up! Trusts His Instincts!".
• Pikachu: "Pika Pika!" became "The Electric Mouse Pokemon".
• Lucario: "Master of Aura" became "Exudes Power".
• Jigglypuff: "The Sleepy Singer" became "The Delightful Balloon Pokemon".
• Greninja: "Master of Stealth" became "The Unpredictable Ninja Pokemon".
• R.O.B.: "The Last of His Kind" became "Robotic Obliterating Buddy".
• Captain Falcon: "The Supersonic Slugger" became "The Supersonic F-Zero Pilot".
• Wii Fit Trainer (F): "The Yoga Warrior" became "She'll Make You Feel The Burn!".
• Shulk: "The Visionary" became "Has Visions of Victory".
• Dr. Mario: "The Prescriber" became "Fists Full of Medicine".
• Lucina: "Warrior from a Doomed Future" became "Defiant of Destiny".
• Pac-Man: "The Yellow Bane of Ghosts" became "Ghost-Gobbler".
• Sonic: "The Blue Blur" became "Speed is His Game".
• Mega Man: "Blue Metal Hero" became "The Blue Bomber".
• Wii Fit Trainer (M): "The BMI Bandit" became "He'll Blast Your Core!".
• Alph: "Astronaut in Training" became "Novice Explorer, Engineering Pro".

This is the only game in which Kirby doesn't have a new dash attack, but instead reuses the one from Super Smash Bros. Brawl.

According to Masahiro Sakurai, Bowser Jr. was very close to not being included in the game's roster.

The Porky Minch trophy's game chronology only mentions his appearance in Earthbound and not Mother 3, even though the trophy description mentions both games and the trophy's design is taken from Mother 3.

Metal characters reflect daytime Town and City, even at night.

Bowser is the only veteran in the game to not have his victory theme ripped straight from Super Smash Bros. Brawl.

When the track Wrath of The Reset Bomb is played while on the Reset Bomb Forest, it will actually sync with what is happening on the stage, and as a result, pausing the game will stop the track

Chrom was originally intended to be a playable character in the game, but was replaced with Robin as Sakurai thought he'd play too similar to Marth and Ike, and that Robin would be a more unique character. Chrom still however appeared as a part of Robin's Final Smash, and did become playable in the next game in the franchise, Ultimate

During the song "Master Core" (which plays when fighting the identically-named boss in Classic Mode), the instruments will silence after 1 minute and 53 seconds and a series of beeps will play for six seconds before the instruments start playing again. These beeps are Morse Code for "MASTER CORE".

If Shulk is on the Gaur Plains stage when Metal Face appears, Metal Face will occasionally say unique taunts.

The taunts are:
• "If it isn't the puny boy himself.You miss me?"
• "Hey, Monado boy, I don't think you can hurt me with that thing"
• "OH! It looks like Monado boy's been practicing"
• "If the brat's here, I bet Dunban can't be far behind."

The amiibo figures sold alongside the game are well known for having a number of defect units. These include, but are likely not limited to:
• Samus having 2 cannons instead of 1.
• Marth having 2 swords instead of 1.
• Peach having no legs.
• Luigi missing his left hand.

When Pit gets KO'd he'll sometimes say, "I'm Finished". This is a reference to the original Kid Icarus Game Over screen.

The trophy for the Lurchthorn enemy from Kid Icarus: Uprising references Superman. The first sentence reads, "Is it a bird? Is it a plane? No, it's... some kind of giant fossilized fish."

In the Boxing Ring stage of the Wii U version of the game, character aliases appear on the screen in the background which reference other games or early concepts, such as Mario's being "Mr. Video Game Himself" referencing his early name "Mr. Video", and R.O.B.'s being Spoiler:"The Last of His Kind", referencing the events of Subspace Emissary from Super Smash Bros. Brawl in which Spoiler:the other R.O.B.s were destroyed.

While Xander Mobus, the game's announcer, recorded a shout of the game's name (much like Super Smash Bros. Melee), it went entirely unused in the final game's release.

Unlike all previous entries in the Smash Bros. series, Jigglypuff uses the standard Pokemon palette as apposed to her shiny palette. This is most noticeable in her eye color.

According to Masahiro Sakurai, the Orbital Gate Assault stage took one year to create.

The description for the "Souflee" trophy from Kid Icarus reads, "We could tell you it's a cake, but that would be a lie". This is a reference to running gag through the first Portal game, stating that "the cake is a lie".

When initiating Palutena's guidance as Pit when fighting against a Mii gunner, the Nintendo Wii's code name "Revolution" is referenced when Viridi refers to the Mii gunner's motion controlled arm cannon as "revolutionary".

When initiating Palutena's guidance as Pit when fighting against Shulk, Pit will make several quotes to popular phrases used in Xenoblade Chronicles, such as "What a bunch'a jokers" and "Let's not lose our 'eads, though."

Lucina is the only unlockable character who was officially revealed prior to the game's 3DS release and is the first female unlockable character in the Super Smash Bros. series.

Originally, Flying Man had both a 2D and 3D model for when he appears on the Magicant stage. The 3D model was scrapped however, to lessen strain on the 3DS hardware.

Jigglypuff's character model in the 3DS version is recycled from the model used for Jigglypuff in Pokemon X & Y.

During Palutena's Temple, Palutena, Viridi and other characters from Kid Icarus will converse with Pit about the character you're fighting against. This is similar to how Snake in Super Smash Bros. Brawl could use his codec to converse with either Colonel Campbell, Mei Ling, or Otacon when in Shadow Moses Island.

As the Villager does their final smash attack, Tom Nook actually throws furniture into the house being built. There's even a chance he will throw in a Triforce from The Legend of Zelda, as it can be collected in some of the Animal Crossing games as a house decoration.

There is a glitch in the 3DS release that allows Yoshi to grow infinitely larger. If a Yoshi eats and re-lays a big Yoshi, the larger Yoshi will hatch larger than before.

After obtaining every Mii outfit, the game will give you a notification reading, "Collected every type of custom outfit! Your body is ready!" A reference to ##Nintendo## of America CEO Reggie Fils-Aime's popular quote from E3 2007, "My body is ready!", which has since become a popular meme.

When pausing the 3DS version during a match, the player models are switched to a higher resolution version of the fighter's model. Within the game's data are 2 models for each figher, both paused and unpaused.

In the Magicant stage, a stage hazard called the Flying Man can be recruited by players to fight alongside with them until it gets knocked off stage by another player. Each time the Flying Man is defeated, a tombstone appears near where they would normally spawn. Once five tombstones have taken place, the Flying Man will no longer spawn during the round, much alike their roles in Earthbound Zero/Mother and Earthbound/Mother 2, in which five of them are recruitable and will not come back once they are defeated, signified by the addition of tombstones near their house as each one dies.

According to the game's director, Masahiro Sakurai, the reason for Sheik and Zero Suit Samus appearing as separate characters is due to the limitations of the 3DS not being able to have them transform from their respective characters. This option was made because Sakurai wanted both versions of the game to have same roster.

In the North American version, the Mario Kart Shy Guy trophy states that he made his racing debut in Mario Kart 7. This technically is false, as Shy Guy could be played in Mario Kart DS, but only in download play for players who didn't own the game. This was fixed in the UK version by stating he was first selectable in Mario Kart 7.

The StreetSmash minigame is very similar to the Smash Ride minigame from Kirby: Squeak Squad, another game developed by HAL Laboratory.

There are actually two different versions of the Balloon Fight stage. The layout is selected randomly, but the alternate form can be chosen by holding down the L button when selecting the stage.

Holding down the L button when selecting the Boxing Ring stage will change the design of the ring from Punch Out oriented to Super Smash Bros. oriented.

Having specific character pairs fight each other in a normal 1v1 Smash fight results in personalized victory screens:

• Fox beats Falco:"Better luck next time, Falco."
• Falco beats Fox: "You're off your game, Fox."
• Male Robin beats Lucina: "Lucina, I hope I didn't hurt you."
• Female Robin beats Lucina: "How can you protect Chrom if you can't protect yourself?"
• Lucina beats Marth: "This is the Hero-King?"
• Lucina beats Ike: "And they call you the Radiant Hero?"
• Palutena beats Pit:"Oh, so sorry about that, Pit."
• Palutena beats Dark Pit: "Poor little Pittoo."
• Dark Pit beats Pit: "Where's your goddess now?"

Leaked screenshots show that there was originally a trophy for Tharja from Fire Emblem: Awakening, but it was removed from the final game. Some speculate this was because of her suggestive clothing that would have likely given the game a more mature rating from the ESRB. There has been no confirmation that this trophy was ever set to appear.

Holding down L before selecting the Dream Land stage in the 3DS version will cause the stage colors to change to black and white, instead of the usual black and green.

The Pokemon Trainer trophy makes reference to the first opening theme music from the English dub of the Pokémon anime.

"Pop quiz! What do Misty, Brock, Cynthia, Iris, and Ash all have in common? That's right"”they're all Pokémon Trainers! This Pokémon Master in the making is the same. Back in Super Smash Bros. Brawl, he fought to be the very best"”like no one ever was. To smash them was his real test"”to launch them was his cause!"

The song that plays on the results screen after a fight is the character select theme from the first Super Smash Bros.

Sometimes when Luigi uses the green missile and he hits a wall, he will stick to the wall.

Within the game's data are a number of unused images that would have been displayed in the game's tutorial section.

According to Masahiro Sakurai, the reason the Ice Climbers were cut from the roster is because of 3DS hardware limitations. He also states that he didn't want to add them exclusively to the Wii U roster to avoid there being considerable differences between the two versions.

According to the director of the Super Smash Bros. series, Masahiro Sakurai, Lucina was originally considered to be an alternate costume for Marth, but was eventually changed to be her own separate character with slight differences from Marth.

All of the characters in the game were chosen at the start of development. This means Geninja was chosen before Pokemon X & Y was released, and that its inclusion was not because of its popularity.

There was an open slot for a new Pokémon character, and the team began discussing who to put in it, eventually settling on Greninja. All the reference material they had for Greninja were simply drawings at that point. Sakurai went home the same day he received the Greninja reference material and stayed up until midnight to do the motion capture for the character.

The Smash Run mode was influenced by the City Trial mode in Kirby Air Ride.

When Toon Link is fighting, the Toon Link driving the Spirit Train is replaced with Alfonzo.

The Japanese trailer introducing Mega Man in Super Smash Bros. for 3DS and Wii U has "Clash Man" (the original Japanese name) instead of "Crash Man" (the English name) in the Japanese commercial, despite being changed to Crash Man in Japan.