Clone character

A clone character is a character that originates copied from another, and is a concept used in many video game series to quickly increase the size of the playable roster. They are far easier to add than creating a character from scratch, but in exchange, have many of the same attacks and animations as their source, though their properties may be adjusted, giving them a sometimes significantly altered gameplay style. Overall, a clone's status "as" a clone is usually primarily aesthetic.

Historically, clones have proven to be controversial additions to the roster, both in the official Super Smash Bros. titles and in the Super Smash Flash series, as they are often erroneously perceived to be taking the place of a more unique character.

The term semi-clone is occasionally used, but has no firmly agreed-upon definition.

In Super Smash Flash
In the original Super Smash Flash, there were four clone characters, all unlocked by beating a single-player mode with their source.

In Super Smash Flash 2
Clones in Super Smash Flash 2 are more difficult to add than they were in SSF because of the higher number and quality of sprites required. However, they do exist, as a part of the labor in initially creating hitboxes and physics is still saved.

It is worth noting that every character has had a direct file connection to at one point, as he was the first character to be programmed.

Trivia

 * Both clones currently known in SSF2 were revealed at Super Smash Con, in consecutive years.