List of costumes in Super Smash Flash 2

Below is a list of each character's costumes in Super Smash Flash 2, including their order, their corresponding stock icons, and any source material the costumes are or may be based on. Costumes listed as "1" are the default costumes for their respective characters. Cells colored denote costumes available to, and  teams, respectively.

Changing Mario's costume will also change the color appearance of the Luma that appears during Mario Tornado.

Changing Peach's costume will also change the color appearance of her parasol, the Toad that appears during her and the frame that appears during Peach Blossom.

Changing Waluigi's costume will also change the color appearance of his Waluigi Dice and the Piranha Plant that appears during his.

Currently, Donkey Kong has only eight costumes consisting of filters. This will be changed in an upcoming version.

Currently, Zelda has only nine costumes consisting of filters. This will be changed in an upcoming version.

Currently, Sheik has only nine costumes consisting of filters. This will be changed in an upcoming version.

Currently, Meta Knight has only nine costumes consisting of filters. This will be changed in an upcoming version.

Currently, Fox has only eight costumes consisting of filters. This will be changed in an upcoming version.

Currently, Falco has only nine costumes consisting of filters. This will be changed in an upcoming version.

Changing Captain Falcon's costume will also change the color appearance of the Blue Falcon.

Currently, Marth has only eight costumes consisting of filters. This will be changed in an upcoming version.

Changing Chibi-Robo's costume will also change the color appearance of Telly Vision and the Giga-Robo during his.

Changing Tails' costume will also change the color appearance of his Energy Ball, the Magic Hand used during his down smash, the robot deployed when using Remote Robot, and the emblem that appears on the Tornado.

Changing Bomberman's costume will also change the color appearance of his bombs.

Currently, Goku has only nine costumes consisting of filters. This will be changed in an upcoming version.

{|class="wikitable" border="1"
 * align="center"|1
 * align="center"|[[File:SSF2 Naruto stock icon.png]]
 * Based on Naruto's appearance after the time skip from the manga Naruto and the beginning of the anime Naruto: Shippūden.
 * style="background-color:#FF0000;" align="center"| 2
 * align="center"|[[File:SSF2 Naruto stock icon 2.png]]
 * Based on Sakura Haruno's appearance as an adult from the manga and anime Boruto: Naruto Next Generations.
 * style="background-color:#008000;" align="center"| 3
 * align="center"|[[File:SSF2 Naruto stock icon 3.png]]
 * Based on Rock Lee's original appearance from the manga and anime Naruto.
 * style="background-color:#0000FF;" align="center"| 4
 * align="center"|[[File:SSF2 Naruto stock icon 4.png]]
 * Based on Sasuke Uchiha's original appearance from the manga and anime Naruto.
 * align="center"|5
 * align="center"|[[File:SSF2 Naruto stock icon 5.png]]
 * Based on Naruto's original appearance from the manga and anime Naruto.
 * align="center"|6
 * align="center"|[[File:SSF2 Naruto stock icon 6.png]]
 * Based on Kakashi Hatake from from the manga and anime Naruto.
 * align="center"|7
 * align="center"|[[File:SSF2 Naruto stock icon 7.png]]
 * Based on Kiba Inuzuka's original appearance from the manga and anime Naruto.
 * align="center"|8
 * align="center"|[[File:SSF2 Naruto stock icon 8.png]]
 * Based on Madara Uchiha from from the manga Naruto and the anime Naruto: Shippūden.
 * align="center"|9
 * align="center"|[[File:SSF2 Naruto stock icon 9.png]]
 * Based on Hinata Hyūga's appearance after the time skip from the manga Naruto and the anime Naruto: Shippūden.
 * align="center"|10
 * align="center"|[[File:SSF2 Naruto stock icon 10.png]]
 * Based on Boruto Uzumaki from the manga and anime Boruto: Naruto Next Generations.
 * align="center"|11
 * align="center"|[[File:SSF2 Naruto stock icon 11.png]]
 * Based on Izuku "Deku" Midoriya from the manga and anime My Hero Academia.
 * align="center"|12
 * align="center"|[[File:SSF2 Naruto stock icon 12.png]]
 * Resembles Saitama's appearance with his wig from the man
 * align="center"|10
 * align="center"|[[File:SSF2 Naruto stock icon 10.png]]
 * Based on Boruto Uzumaki from the manga and anime Boruto: Naruto Next Generations.
 * align="center"|11
 * align="center"|[[File:SSF2 Naruto stock icon 11.png]]
 * Based on Izuku "Deku" Midoriya from the manga and anime My Hero Academia.
 * align="center"|12
 * align="center"|[[File:SSF2 Naruto stock icon 12.png]]
 * Resembles Saitama's appearance with his wig from the man
 * align="center"|12
 * align="center"|[[File:SSF2 Naruto stock icon 12.png]]
 * Resembles Saitama's appearance with his wig from the man

Changing Ichigo's costume will also change the color appearance of his Hollow mask during his up/down taunt.