In Super Smash Bros., each character had at least four costumes, one for each of the costume-changing C buttons. Some characters had an extra costume (or two) to accommodate for Team Battles if their four costumes lacked a red, blue, or green variation; these costumes cannot be selected outside of Team Battle since there are only four C buttons.
Based on the traditional outfit of Mario's rival, Wario. The M on Mario's hat is colored yellow and the buttons are also colored yellow, compared to the W on Wario's hat which is colored blue and the buttons which are colored white.
Brown
B
A reference to Foreman Spike from Wrecking Crew '98.
Blue
B
A red/blue reversal of his traditional colors. This is seen as a partial reference to Mario's varying appearances in games prior to Nintendo's officially establishment of Mario's outfit of consisting of a red shirt, blue overalls and red hat. In various earlier games, Mario occasionally also appeared with sometimes a blue hat, red shirt with blue overalls or a red hat, blue shirt with red overalls. However, this particular combination of a blue hat, blue shirt, with red overalls was never used in any Mario game as of the release of all games in the "Smash Bros." series, but it does resemble the appearance of the Balloon Fighter. The blue shirt with red overalls are also similar to what Mario wore in the Super Mario Bros. Super Show cartoon and it's two follow-up cartoons, The Adventures of Super Mario Bros. 3 and the Super Mario World cartoon.
Green*
G
The color inverse of his traditional colors. Resembles Mario's appearance on Japanese and European box arts for Wrecking Crew. Also appears as part of the flashing animation from a Starman in Super Mario Bros.
Based on his appearance from Donkey Kong Country and the Nintendo 64 era.
Black
B
Possibly based on the appearance of an actual gorilla and a SGB look for Donkey Kong '94.
Red
R
Possibly based on his sprite in the original Donkey Kong.
Blue
B
N/A
Green*
G
Resembles the green palette for Donkey Kong '94 and Donkey Kong Land, due to the Game Boy's native colour palette. This is the only Donkey Kong costume to date to change the color of his skin.
Based off the Red Ring from the original The Legend of Zelda and a Shield Spell from Zelda II: The Adventure of Link. Also similar to the Goron Tunic from The Legend of Zelda: Ocarina of Time.
Based off the appearance of the Varia Suit when missiles are selected in the original NES Metroid game. It could also possibly be based on the Gravity Suit from Super Metroid.
Black
B
N/A
Green
G
In Japan, the original Smash 64 website referred to this alternate costume as "Production Model Samus", often referred to as "Mass Produced Samus" in the community. A reference to the mass-produced mechas from the Gundam series, which are almost always green.
Blue*
B
Bears similarity to Samus wearing her Gravity Suit in her official art from Super Metroid.
Based on Keeby, the yellow Kirby that the second player controls from Kirby's Dream Course, known as Kirby Bowl in Japan. Resembles Beam and Needle Kirby from Kirby Super Star and Kirby: Nightmare in Dream Land, without the hat. Shigeru Miyamoto also reportedly wanted Kirby to be colored yellow in his debut, but Masahiro Sakurai wanted him to be pink. Also references Yellow Kirby in Kirby and the Amazing Mirror and Kirby: Squeak Squad, as well as Player 2 Kirby in many current-gen multiplayer Kirby games.
A Pikachu with a red hue is possible in Japanese Pokémon Stadium 1 and 2 and International Pokémon Stadium (N64) as the game did change the colors of Pokémon if they were given nicknames. Shiny Pokémon did not exist in Generation I.
Blue
B
As mentioned, Pokémon Stadium allowed for alternate colored Pokémon if they were given nicknames.
Green
G
As mentioned, Pokémon Stadium allowed for alternate colored Pokémon if they were given nicknames. One of the Rental Pokémon, a Pikachu called Pikachikun, has a green hue.
Based on his appearance from the Nintendo 64 era, although his overalls are purple instead of blue which makes him resemble his sprite from Super Mario World.
White
W
Based off Luigi's appearance in Mario Bros. for the NES as well as his sprite from the original Super Mario Bros.. Also bears a similar outfit to that of Fire Luigi. It is the only costume to change Luigi's skin color and gloves.
Blue
B
Based on Mario's appearance on the cover of the NES version of Mario Bros.
Pink
P
Comes from the game Wrecking Crew, in which Luigi wears pink.
The black and yellow stripes resemble the uniform of the Hanshin Tigers, a Japanese baseball team with a large following. The shirt also bears a very similar color scheme to the Gigantic Ant enemy from EarthBound.
Blue
B
Is based on Ness's younger self that he encounters briefly in EarthBound, who was wearing a blue hat.
Green
G
This costume very closely resembles the character, Everdred, from Earthbound, who was dress in green and orange. However, Ness wears a green hat instead of black, which is the color of Everdred's hat. The shorts, also with a color change, are orange instead of green.
Captain Falcon is the only character to have six different playable palette swaps, even though two of them (blue and green costumes) can only be accessed during Team Battles.
Indigo
I
Based on his appearance from F-Zero X, although his suit is purple instead of blue.
Black
B
Resembles Captain Falcon in the Japanese commercial for F-Zero X.
Red
R
Based on the appearance of his clone and rival, Blood Falcon.
White
W
Based on the colors of Jody Summer's outfit.
Green*
G
Resembles the colors of Pico's F-Zero machine, Wild Goose, in F-Zero.
Blue*
B
A brighter version of his standard colors that resembles the original F-Zero SNES boxart.
Nicknamed Jigglypuff in Pokémon Stadium could appear violet.
Green
G
Nicknamed Jigglypuff in Pokémon Stadium could appear cream-colored.
* Available through Team Battles only.
** Color is exclusive to CPU opponents in Single Player mode.
N/A: Color that is original to Super Smash Bros. and doesn't have any particular reference.
Stats
There is a total of 56 alternate costumes.
The average number of costumes per character is 4.
Captain Falcon and Yoshi share the highest amount of color swaps: 6.
There are 6 fighters with only 4 color swaps, and 4 fighters with only 5.
