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

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

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

Currently, Donkey Kong 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.

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

Changing Ganondorf's costume will also change the color appearance of Ganon during Dark Beast Ganon.

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

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

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

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

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

Changing Yoshi's costume will also change the color appearance of the eggs used while shielding and during Egg Roll and Egg Toss.

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

Trivia

 * Compared to development builds of Beta 1.2, most of Mario's costumes have been modified or replaced.
 * Mario's blue costume had darker overalls.
 * Mario's Wario-inspired costume had the same color of overalls and the "M" on his cap.
 * The color of the shirt in Mario's black costume was slightly closer to the color in 
 * Mario's green costume was based on his fifth costume in , but his shoes and the "M" on his cap are cyan.
 * Mario's purple costume was brighter.
 * Mario's Shadow Mario-inspired costume was light blue instead of blue.
 * Mario also had costumes based on Cloud Mario from Super Mario Galaxy 2, Builder Mario from Super Mario Maker, and Classic Outfit from Super Mario Odyssey.
 * Peach's white costume was based on her sixth costume in  in development builds of Beta 1.2.0.
 * Prior to Beta 1.2, Mr. Game & Watch had 17 and Tails had 14 filtered costumes.
 * Interestingly, one of Goku's filtered costumes that existed prior to Beta 1.2 had been replaced.