Bowser Jr. (SSB4)

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SSB4 Icon.png
Bowser Jr.
in Super Smash Bros. 4
Bowser Jr. SSB4.png
Universe Mario
Availability Unlockable (3DS)
Starter (Wii U)
Final Smash Shadow Mario Paint
Tier G (46/47)
This article is about Bowser Jr.'s appearance in Super Smash Bros. 4. For the character in other contexts, see Bowser Jr..
Bowser Jr. Clowns The Competition!
—Introduction Tagline

Bowser Jr. (クッパ Jr., Koopa Jr.) is a playable character in Super Smash Bros. 4. Alongside Mr. Game & Watch, Bowser Jr. was officially revealed during the Super Smash Bros. for Wii U: 50-Fact Extravaganza on October 23, 2014, being the second-to-last newcomer shown by an official source. Prior to that, he was leaked by ESRB on August 29th, 2014 alongside Shulk and Ganondorf. Bowser Jr. was also among the sixth wave of amiibo figures that are compatible with SSB4. Caety Sagoian reprises her role as Bowser Jr.'s voice actor, albeit via recycled voice clips from various Mario spin-off games. The Koopalings also use their voice clips from the New Super Mario Bros. games, which were voiced by Lani Minella (Larry, Morton, Wendy, and Lemmy), Mike Vaughn (Iggy and Ludwig) and Dan Falcone (Roy).

Bowser Jr. is tied with Wii Fit Trainer for 46th/47th out of 58 on the tier list, placing them in the G tier. Bowser Jr. has one of the best neutral games among the cast, as Clown Kart Dash functions as an excellent approach option and provides an impressive amount of versatility, while Mechakoopa is a very useful pressure option. Despite being a heavyweight, Bowser Jr. also sports a deceptively good air game, courtesy of his fairly fast aerial mobility and his aerial attacks' follow-up and juggle potentials. In addition, Bowser Jr. is notably the only character in the game who has disjointed hitboxes on all of his attacks. This distinctive trait enables him to attack from a reasonably safe distance, which is supplemented by a number of his attacks being powerful enough to KO under 100%.

Despite his strengths, Bowser Jr. has noticeable flaws. His overall grounded mobility is slow, which necessitates using Clown Kart Dash in order to keep up with faster opponents. Lag is another glaring issue; many of Bowser Jr.'s attacks have among the largest amounts of ending lag in the game, while his grab game suffers from his standing, pivot and dash grabs' overall lag. His grab game is further compounded by very unimpressive throws, with only his back throw being somewhat viable at best as a KOing option. Lastly, Bowser Jr.'s recovery can be problematic despite his good aerial mobility. This is due to Abandon Ship! offering no overhead protection and thus being very susceptible to gimps, as well as being unable to be re-used if he is hit by a weak attack.

Overall, Bowser Jr. is a character who can pressure and combo certain opponents easily once he is mastered. However, due to his current position in competitive play, Bowser Jr.'s impact on the current metagame is very low despite the efforts of Tweek, who notably spearheaded his metagame before dropping him. This is also reflected in his tournament results, which are currently below average due to his very small playerbase. Nonetheless, he has still made waves of attention from time to time, such as with Jade defeating Trela's Ryu at CEO 2016. Additionally, Tweek announced after CEO 2016 that he would resume playing Bowser Jr., which may result in his tournament presence improving.

How to unlock[edit]

Complete one of the following:

  • Play 100 VS Matches.
  • As Bowser, complete Classic mode on Intensity 6.0 or higher.

After completing one of the two methods, Bowser Jr. must then be defeated on 3D Land.

Bowser Jr. does not have to be unlocked in Super Smash Bros. for Wii U.


Bowser Jr. is tied with Samus as the sixth heaviest character, yet he possesses overall decent mobility. While he has slow walking and dashing speeds, a fast falling speed and above average gravity, all of which are typical of a heavyweight, he has a surprisingly fast air speed and above average air acceleration. Outside of this, Bowser Jr. possesses a few unorthodox, yet noteworthy, traits. Like Duck Hunt's dog and duck, he and his Junior Clown Car have two separate hurtboxes, although this is much more apparent for Bowser Jr. and his Clown Car: attacks that hit the Clown Car will deal 0.88x damage, whereas those that hit Bowser Jr. himself will deal 1.15x damage.[1] Another quirk Bowser Jr. possesses is his vast amount of disjoints, as he is the only character in the game whose every attack has disjointed hitboxes.

Clown Kart Dash is considered to be Bowser Jr.'s best move overall because of its versatility, with its most apparent benefit being much better movement to make up for his slow dashing speed (which can be made even faster via jump canceling) and grants him an excellent approach option. Clown Kart Dash is also integral to Bowser Jr. due to its mindgame and damage racking potentials. It can function either as a strong head-on attack or initiate aerial combos due Bowser Jr. being able to jump during it, which are further improved by jump canceling. Lastly, it can function as a horizontal recovery option, which is further supplemented by its doughnut-based attack and having armor that can withstand a maximum of 7%.

Abandon Ship! is another useful move that possesses impressive knockback and grants Bowser Jr. considerable vertical distance. Unlike most recovery moves, Abandon Ship! does not initiate helplessness; this allows Bowser Jr. to not only air dodge if necessary, but also allows him to perform a powerful hammer swing upon pressing the attack button, which is an almost guaranteed KOing option when used in sync with Clown Kart Dash at high percentages. Mechakoopa is a very useful tool for zoning, combos, follow-ups, and even defensive purposes due to its ability to block incoming projectiles like Link's and Toon Link's Bombs can.

Bowser Jr.'s good aerial mobility supplements the utility of his aerial attacks. His neutral aerial is useful as both an edge-guarding and out of shield option. His forward and back aerials are useful as edge-guarding, spacing and KOing options. While Bowser Jr.'s up aerial only hits above him, it is capable of juggling and can KO on stages with low ceilings, such as Battlefield or Town and City. Down aerial can shield stab and works well used out of Clown Kart Dash at lower percentages due to the hitbox it produces compensating for its high landing lag.

Despite his great aerial mobility and damage racking potential, Bowser Jr. is not without his flaws. One of his biggest problems is that his recovery is glaringly susceptible to gimps. While Abandon Ship! grants him impressive vertical distance, a weak hit from an attack can result in Bowser Jr. not being able to respawn his Clown Car if the player does not button mash. Another major problem that Bowser Jr. faces is a lack of viable options on shield, making him susceptible to punishes. Bowser Jr. is also a very straight-forward character, which can make him quite predictable at times. In addition to this, Mechakoopa is the crux of Bowser Jr.'s neutral game, making it easy (especially for characters such as Rosalina & Luma) to shut down his options. Also, his Clown Cannon is a slow move that, unlike most chargeable projectiles, cannot be stored. Despite his grab range being rather long-ranged and his back throw being a somewhat viable KOing option, his grab comes out very slowly (on frame 12) and his other throws are not very useful in general due to their inability to KO reliably or initiate combos. Finally, Bowser Jr. suffers from poor KO potential due to having very few reliable KOing options.

Bowser Jr. gains very few buffs from his custom moves. Piercing Cannon is faster and pierces opponents, but it deals less damage and knockback. Air Cannon is also faster and briefly stalls Bowser Jr. in midair, but replaces the cannonball with a windbox, which re-purposes it from an offensive option to a defensive option. Big Mechakoopa is stronger and larger, but it sacrifices Mechakoopa's ability to trip up opponents. Outside of these, Bowser Jr.'s remaining customs are less effective than the default versions.

Overall, Bowser Jr. fares well with a bait and punish playstyle like his father, but he can also be potent at pressuring the opponent thanks to Clown Kart Dash and Mechakoopa. However, his slew of his easily exploitable weaknesses can make him a bit underwhelming overall and greatly overshadowed compared to the rest of the cast. While his flaws have result in his lack of representation in the Western scene, the Japanese scene views him more favorably. Additionally, professionals like Tweek have shown that he can be viable when his strengths are played wisely and to their fullest.

Update history[edit]

Bowser Jr. has been slightly buffed via the game updates. The most notable instance occurred in update 1.1.4, which moderately decreased his smash attacks' ending lag and made his forward and back aerials stronger. The changes to the shield mechanics in updates 1.1.0 and 1.1.1 also slightly help him due to some of his moves possessing high damage outputs and/or hitting multiple times.

Super Smash Bros. for Nintendo 3DS 1.0.4

  • Nerf Down throw deals slightly less damage: 8% → 7.5%. It also does eight hits, down from ten.

Super Smash Bros. 4 1.0.6

  • Buff Forward smash's initial hitbox placement adjusted and its last hitbox size increased: 6u → 7u. This enables it to hit at a closer range.
  • Change Neutral infinite has less visual whiffs.

Super Smash Bros. 4 1.1.0

  • Buff Clown Cannon deals more damage: 7% (uncharged)/4.4% (uncharged late), 18% (fully charged)/12.6% (fully charged late) → 8.5%/5.9%, 20%/14%.

Super Smash Bros. 4 1.1.1

  • Bug fix Floor attack's shield damage output matches the other characters': 1 → 8.
  • Buff Back floor attack deals 10 shield damage, as did the other characters' before update 1.1.1.
  • Buff Clown Cannon's knockback increased: 80 (sweetspot)/60 (sourspot) → 85/65.
  • Buff Clown Cannon's hitbox size increased: 4.5u → 5.5u.
  • Buff Air Cannon's ending lag decreased by 14 frames due to it running 1.3x slower rather than 2x on frames 5-25.

Super Smash Bros. 4 1.1.4

  • Buff All smash attacks' ending lag decreased: 60 frames → 56 (forward), 63 frames → 57 (up), 68 frames → 60 (down).
  • Buff Forward aerial deals more damage: 8% → 9% (clean), 5% → 7% (late).
  • Buff Forward aerial knockback increased: 30 (base)/90 (scaling) → 33/93.
  • Buff Back aerial's late hit deals 2% more damage (8% → 10%) and knockback scaling (90 → 92).


  • Attacks that hit the Junior Clown Car deal 0.88x damage, whereas those that hit Bowser Jr. himself will deal 1.15x damage.[2]
  Name Damage Description
Neutral attack   3% The Junior Clown Car punches twice, followed by a flurry of punches and a finishing punch. It deals impressive damage and knockback for a neutral attack, as it can easily deal around 20% and KO around 130%-150% at the edge of a stage.
1% (loop), 3% (last)
Forward tilt   8% The Junior Clown Car thrusts a pitchfork forward. It can be angled and is decent for spacing.
Up tilt   6% The Junior Clown Car thrusts a pitchfork upward. It can chain into itself beginning at 0% and juggle at medium percentages, but has a blind spot between the fork's prongs and the Junior Clown Car.
Down tilt   1.5% (hits 1-2), 5% (hit 3) The Junior Clown Car opens its mouth to attack with a tongue. It has a fair amount of utility, as it is efficient at warding off rushdowns, can act as a set-up for a dash attack, or interfere with an opponent attempting to grab an edge due to the tongue's undulating hitbox.
Dash attack   1.5% (loop), 4% (last) The Junior Clown Car opens its mouth to attack with a Grinder. Its loop hits do not connect together very well at high percentages.
Forward smash   1% (loop), 11% (last) The Junior Clown Car uses two drills to pierce the opponent. It is a powerful KOing option with low ending lag and it can be angled.
Up smash   1% (first), 1.3% (loop), 1% (second to last), 6% (last) Bowser Jr. performs a handstand to attack with the Junior Clown Car's spinning propeller. It is Bowser Jr.'s fastest smash attack.
Down smash   18% The Junior Clown Car slams wrecking balls on both sides. It is Bowser Jr.'s most powerful smash attack, but unlike his other smash attacks, it has high ending lag.
Neutral aerial   6% (clean), 5% (mid), 3% (late) The Junior Clown Car spins around with the boxing glove arms extended. It combos reliably from Clown Kart Dash and is a useful anti-pressure option.
Forward aerial   11%/9% (clean), 8%/6.5% (mid), 5%/4% (late), 2% (landing) The Junior Clown Car swings a wrecking ball forward. Landing while the wrecking ball is still out produces another hitbox, which can lead to more follow-ups on the ground, as well as compensate for its high landing lag. Useful for edge-guarding and spacing as well as a viable KOing option.
Back aerial   14% (clean tip), 8% (clean base, late) The Junior Clown Car swings a wrecking ball backward. Like his forward aerial, landing while the wrecking ball is still out produces another hitbox, which can lead to more follow-ups on the ground. Useful for edge-guarding and a viable KOing option.
Up aerial   10% (clean), 6.5% (late) Swings a hammer above himself. It has very little ending lag and is a useful juggling option.
Down aerial   1.3% (loop), 2% (last), 2% (landing) The Junior Clown Car extends a drill from its underside hatch to pierce opponents. Its high ending lag is compensated by the hitbox it produces upon landing, which grants it follow-up potential.
Grab   The Junior Clown Car extends a claw to grab the opponent. A slow grab overall.
Pummel   2% Hits the opponent with a toy hammer. A fairly fast pummel. The toy hammer looks identical to the one used in the Eekhammer sticker from Paper Mario: Sticker Star.
Forward throw   3% (hit 1), 6% (throw) The Junior Clown Car throws an uppercut. It is fairly good for launching opponents at the edge for an edge-guard.
Back throw   13% The Junior Clown Car spins and then throws the opponent backward. Bowser Jr.'s most powerful throw, as it can KO most middleweights starting around 160% without rage.
Up throw   7% The Junior Clown Car flings the opponent upward. It can lead into up aerial at low percentages.
Down throw   0.5% (loop), 4% (throw) The Junior Clown Car throws the opponent onto the ground and then extends a drill from its underside hatch to pierce opponents. It can be used to pressure the opponent into his Clown Kart Dash.
Floor attack (front)   6% Gets up while spinning a pair boxing gloves outstretched on both sides.
Floor attack (back)   7% Gets up while spinning a Grinder around himself.
Floor attack (trip)   5% Gets up while thrusting a pitchfork on both of sides.
Edge attack   7% Slams a pair of wrecking balls while climbing up.
Neutral special Default Clown Cannon 8.5% (uncharged), 5.9% (uncharged late), 20% (fully charged), 14% (fully charged late) The Junior Clown Car opens its mouth and fires a cannonball. It can be charged to increase the cannonball's speed and power. At the end of its path, the cannonball will drop to the ground, which can hit opponents attempting to recover if it is spaced properly.
Custom 1 Piercing Cannon 4% (uncharged), 10% (fully charged) Fires a cannonball that pierces opponents and travels faster than the standard Clown Cannon, although the cannonball deals less damage and is smaller.
Custom 2 Air Cannon Fires a gust of wind that will push opponents backward, although it deals no damage. In the air, it can also be used to move backward quickly, aiding Bowser Jr.'s horizontal recovery.
Side special Default Clown Kart Dash 4%+speed (collision), 8% (doughnut) The Junior Clown Car transforms into a go-kart that speeds forward. Tilting the control stick in the opposite direction or pressing the attack/special button will cause the Junior Clown Car to perform a doughnut, which deals more damage and knockback to opponents on contact compared to simply charging into them. Spinning out in the air can produce horizontal movement, after which this move can be used again. All versions of the move can be jump canceled, even right after hitting an opponent, which can lead into combos and mix-ups.
Custom 1 Koopa Drift 2%+speed (collision), 1% (doughnut loop), 2% (doughnut last) The go-kart careens forward during the doughnut, hitting opponents multiple times. Careening in the air grants much more horizontal recovery, but its jumps are much lower.
Custom 2 Grounding Dash 8%+speed The Junior Clown Car travels faster initially, but its doughnut does not deal damage. It buries grounded opponents on contact, but grants less horizontal distance.
Up special Default Abandon Ship! 5% (contact), 13% (explosion), 15%/10% (hammer) Bowser Jr. ejects himself from the Junior Clown Car. The Junior Clown Car slowly falls to the ground and then explodes when the move is used in midair, whereas it will simply explode after a brief period when used on the ground. When Bowser Jr. is out of the Junior Clown Car, he is not rendered helpless and can still attack with a hammer, which is surprisingly powerful enough to KO at medium to high percentages.
Custom 1 Meteor Ejection 8%/3% (contact), 10% (explosion), 15%/10% (hammer) The Junior Clown Car produces a meteor effect upon activation. However, it covers less vertical distance, whereas Bowser Jr. seems to cover more horizontal distance after being ejected.
Custom 2 Koopa Meteor 17% (contact), 15%/10% (hammer) Ejects Bowser Jr. high into the air before the Junior Clown Car explodes, ejecting him downward. Deals strong knockback and a powerful meteor smash upon contact on opponents caught near the bottom.
Down special Default Mechakoopa 2% (contact), 9% (explosion) The Junior Clown Car drops a Mechakoopa from its underside hatch. If it reaches a wall, it will turn around and walk in the opposite direction. If it makes contact with an opponent, it will detonate. Lastly, if enough time passes and they have not hit an opponent yet, they will spark out and detonate automatically. They can be picked up and thrown as items either by Bowser Jr. or his opponent.
Custom 1 Impatient Mechakoopa 5% Launches a Mechakoopa at a fair distance. The Mechakoopa is armed to explode the moment it is launched and will explode shortly after landing.
Custom 2 Big Mechakoopa 15% The Mechakoopa is larger and walks a shorter distance, but it deals more damage if it is thrown.
Final Smash Shadow Mario Paint 3% (paint), 5% (explosion) Bowser Jr. transforms into Shadow Mario and uses the Magic Paintbrush to paint a giant, orange X on the screen. Anyone caught in the X's hitbox will take damage. The X will clear away with a final burst after some time. The sheer size of the X makes avoiding damage from this Final Smash difficult.

On-screen appearance[edit]

  • Flies onto the stage in the Junior Clown Car and makes a taunting facial expression towards the camera.


  • Up taunt: Jumps up, sits on the rim of the Junior Clown Car, and exhales a tiny flame while chuckling.
  • Side taunt: Pulls out a hammer and swings it around twice.
  • Down taunt: The Junior Clown Car turns into its go-kart form, sports an angry expression while performing a doughnut, then returns to normal.
Up taunt Side taunt Down taunt
BowserJrUpTauntSSB4.jpg BowserJrSideTauntSSB4.jpg BowserJrDownTauntSSB4.jpg

Idle poses[edit]

  • Places his hand over his eyes and looks around while Super Smash Bros. for Nintendo 3DSsmiling with his mouth closed or Super Smash Bros. for Wii Usmiling with his mouth open.
  • Jumps impatiently in the Junior Clown Car.
BowserJrIdlePose1WiiU.jpg BowserJrIdlePose2WiiU.jpg

Crowd cheer[edit]

BowserJrHeadSSB4-U.png BowserJrHeadLarrySSB4-U.png BowserJrHeadRoySSB4-U.png BowserJrHeadWendySSB4-U.png BowserJrHeadIggySSB4-U.png BowserJrHeadMortonSSB4-U.png BowserJrHeadLemmySSB4-U.png BowserJrHeadLudwigSSB4-U.png

BowserJrHeadSSB4-U.png BowserJrHeadLarrySSB4-U.png BowserJrHeadRoySSB4-U.png BowserJrHeadWendySSB4-U.png BowserJrHeadIggySSB4-U.png BowserJrHeadMortonSSB4-U.png BowserJrHeadLemmySSB4-U.png BowserJrHeadLudwigSSB4-U.png

Victory poses[edit]

A rock-based remix of the Victory Theme used in Super Mario Bros.
  • Uses Clown Kart Dash while laughing, then stops and pulls out a hammer.
  • Gets out of the Junior Clown Car and rubs it with his right hand while Super Smash Bros. for Nintendo 3DSsmiling with his mouth open or Super Smash Bros. for Wii Usmiling with his mouth closed.
  • Jumps out of the Junior Clown Car, hops in celebration a few times while laughing, then strikes a pose.
BowserJr.Pose1WiiU.gif BowserJr.Pose2WiiU.gif BowserJr.Pose3WiiU.gif

In competitive play[edit]

Official Custom Moveset Project[edit]

Character Custom sets available
BowserJrHeadSSB4-U.png Bowser Jr. 1113 1121 1123 1211 1213
1313 3111 3113 3213 1112

Notable players[edit]



Tier placement and history[edit]

Bowser Jr. was initially considered to be a high-tier character due to his attacks having disjointed hitboxes and Clown Kart Dash's incredible versatility. However, like many other characters, Bowser Jr. began to drop on the tier list once players discovered that his he has a very linear neutral game, lackluster shield pressure, laggy grabs, and exploitable recovery. All of these attributes resulted in him struggling against many top-tier characters. However, Tweek still managed to achieve impressive results with Bowser Jr., such as placing 25th at EVO 2015, which was especially significant due to Bowser Jr.'s lack of improvement with custom moves. Tweek also managed to place 33rd at GENESIS 3 and consistently achieve top 8 placings in his region. As a result, Bowser Jr. was ranked 34th on the first tier list, placing him in the F tier.

However, after Tweek dropped Bowser Jr. in favor of Cloud, his tournament prominence has dropped significantly. While he still achieves decent results thanks to many dedicated players, such as Vicegrip and Jade (the latter of whom notably defeated Trela at CEO 2016), Bowser Jr.'s lack of high placings at tournaments resulted in him drop to 46th/47th place, tying him with Wii Fit Trainer and placing them both in the G tier.

Reveal trailer[edit]


Bowser Jr.
ntsc Bowser's beloved, spoiled son sports a bandanna with a large mouth drawn on it. Like his father, Bowser Jr. longs to take Mario down. In Smash Bros., he'll fight from inside his heavily armed Junior Clown Car. The Clown Car takes less damage than Bowser Jr., so mind your positioning.
pal Bowser's probably a big fan of his son, what with him hating Mario just as much as dear old Dad does. The tyke's Junior Clown Car is packed with gadgets and gizmos to throw at enemies! By the way, he's extra vulnerable when he jumps out of it, wouldn't dream of attacking the cute little fella then, would you?
GameCube: Super Mario Sunshine (08/2002)
Wii: New Super Mario Bros. Wii (11/2009)
Bowser Jr. (Alt.)
ntsc The Clown Kart Dash special move turns the Junior Clown Car into a kart. If you change direction while driving it, it'll spin and do more damage. When you use his up special, Bowser Jr. leaps from his Junior Clown Car, dropping it on the foes below.
pal The Clown Kart Dash special move turns the Junior Clown Car into a kart. If you change direction while driving it, it'll spin and do more damage. When you use his up special, Bowser Jr. jumps out of the Junior Clown Car, letting it hit opponents. Try to catch opponents with it while you're directly over them to hit them on the head!
GameCube: Super Mario Sunshine (08/2002)
Wii: New Super Mario Bros. Wii (11/2009)
Shadow Mario Paint
ntsc In Super Mario Sunshine, someone went around causing havoc disguised as Mario. It turned out not to be the brawny Bowser, but his brainier son, Bowser Jr. Now he becomes Shadow Mario again for his Final Smash, painting a giant X on the screen. It sticks around after Bowser Jr. transforms back, letting him gleefully knock foes into it.
pal In Super Mario Sunshine, someone went around causing havoc disguised as Mario. It turned out not to be the brawny Bowser, but his brainier son, Bowser Jr. Now he becomes Shadow Mario again for his Final Smash, painting a giant cross on the screen. It sticks around after Bowser Jr. turns back, so he can gleefully knock people into it.

In Event Matches[edit]

Solo Events[edit]

Co-op Events[edit]

  • A Lurking Menace: Mario and Luigi must defeat Bowser Jr., but if the match lasts too long, they must also defeat a giant Bowser.
  • Peach in Peril: Bowser Jr. and Bowser must defeat all opponents except Peach, where KOing her results in a failure.
  • Solidarity: Olimar and Rosalina & Luma must defeat Mario and Luigi and then they must defeat Bowser Jr. and Bowser.
  • The Ultimate Battle: Two players select a character and must defeat the entire roster.

Alternate costumes[edit]

Instead of alternate color schemes, Bowser Jr.'s alternate costumes consist of all seven Koopalings. Bowser Jr.'s Junior Clown Car is the only one with black eyes and horizontal orange "eye paint", while the Koopalings' Clown Cars have yellow mechanical eyes with vertical black "eye paint".

Bowser Jr. Palette (SSB4).png
BowserJrHeadSSB4-U.png BowserJrHeadLarrySSB4-U.png BowserJrHeadRoySSB4-U.png BowserJrHeadWendySSB4-U.png BowserJrHeadIggySSB4-U.png BowserJrHeadMortonSSB4-U.png BowserJrHeadLemmySSB4-U.png BowserJrHeadLudwigSSB4-U.png



  • Bowser Jr. is the only character who does not have an alternate costume that shares the same name as the default costume or is a palette swap of the original costume. Due to this, he's the only character to use his default color scheme in his Alt. trophies.
    • Similarly, Bowser Jr. is the only character who does not use an alternative costume when he is fought in rounds 4-5 in Super Smash Bros. for Wii U's classic mode, as well as Smash Tour with customs. However, Larry will appear in his place in a team battle if the player chooses a previously-defeated Bowser Jr. as a teammate.
    • This additionally makes Bowser Jr. and Villager are the only characters where all eight of their palette swaps have a chance of appearing in All-Star Mode. However, because his placement in All-Star Mode is based on his debut rather than that of the Koopalings (who debuted before him), the Koopalings will be misplaced chronologically during All-Star mode if the opponent's costume is a Koopaling. The same applies to Olimar and Alph.
  • Bowser Jr. is the only newcomer to be both a starter character and an unlockable character in SSB4.
  • Bowser Jr. was on the brink of being cut as a playable character due to limited time and resources. He barely got onto the roster due to the game staff's diligent work.[3]
  • When Bowser Jr. gets a Super Leaf, the ears will be on his head but the tail will be on the back of his Junior Clown Car.
    • When he uses Abandon Ship!, the tail on the Junior Clown Car disappears.
  • One of Bowser Jr.'s conquest teams is called the "Kooky Kids". "Kooky" is also Ludwig's name in the DiC Entertainment cartoons The Adventures of Super Mario Bros. 3 and Super Mario World.
    • On the official Super Smash Bros. Facebook page, Wendy was called "a Kootie-Pie", a reference to her name in the DIC Entertainment cartoons.
    • On the same Facebook page, Lemmy is noted as "Hip but no Hop", a reference to Lemmy being called Hip and Iggy being called Hop in the cartoons.