Series symbol

A series symbol is a distinctive iconography that represents an in-game universe in the Super Smash Bros. series and that is also present in Super Smash Flash 2. These symbols are assigned to playable characters, stages and, to an extent, items, but only if there is a representative of the first two, otherwise the Super Smash Bros. symbol is assigned by default. Within the game, the symbol can be seen next to a character's damage counter being the same color of the player's number, it can also be seen next to the stage's name display on the stage selection screen, in the Vs. screen of Classic mode and in the background for personal Target Smash!! levels. Pages on the Smash Flash DOJO!!! also carry a symbol on the upper left corner of the update. Despite a simplistic feature, there were no symbols in the original Super Smash Flash. Below is a list that compiles and explains each symbol's source origin:

Former symbols
Beta These symbols were present at some point before being discarded due to updated symbols.

Trivia

 * Metal Gear is the only universe to have no actual symbol in Super Smash Flash 2 anywhere else. The one seen above is taken from Super Smash Bros. Brawl.