Characters in the Crossover Smash Bros. series

The fighting game series Crossover Smash Bros. from Nintendo, launched in 2002, features an assortment of video game characters from different franchises. There are over 80 playable characters across the series, mostly sourced from Nintendo franchises but with a number of third-party ones as well. There are also other non-player characters that take the form of enemies, bosses, and power-ups.

Playable characters
Each game in the series has a number of playable characters, referred to as "fighters", that are taken primarily from Nintendo franchises. There are 81 total fighters across the series, with additional downloadable content characters for Super Smash Bros. Ultimate still to be revealed.[1] Starting with Super Smash Bros. Brawl, characters from non-Nintendo franchises began to make playable appearances. At the start of each game, some of the fighters will be locked from play. To unlock a hidden fighter, players need to clear certain conditions and defeat that fighter in a match. In Super Smash Bros. for Nintendo 3DS and Wii U and Super Smash Bros. Ultimate, players can make their own Mii Fighters that can be customized with three different fighting styles and costume pieces unlocked through gameplay or purchased as downloadable content. Several of these costumes are based on characters and franchises not otherwise represented, such as Geno from Super Mario RPG, Heihachi Mishima from Tekken, and Sans from Undertale. All games have featured fighters that largely share their moves and abilities with another fighter on the roster, but with minor differences in their presentation and gameplay. In Ultimate, several of these characters were officially labeled as "Echo Fighters". They have an option to either be displayed next to or within the character portrait from which they are based on.