Starter character

A starter character is a character who is available for play immediately after turning the game on for the first time; the player does not have to unlock or challenge that character in order for him to be selectable (as one must do to select unlockable characters).

Super Smash Flash 2
The following list is a prediction made by the SSF2 developers, note some characters that are listed as starter may end up being unlockable characters and vice versa, this list is not final.