Special Smash

Special mode, also called special versus or special VS, is a game mode in Super Smash Flash 2. It allows players to apply special modifiers to a match such as making the characters bigger or turning into an egg upon being hit.

Special mode was confirmed to appear in SSF2 on July 26, 2013 by Cleod9 himself when he announced version 0.9b of the demo. Players is allowed to select multiple options at the same time like in Super Smash Bros. Brawl.

Modifiers
There are thirteen modifiers in the game.

Mini
Mini causes all characters to be as small as if they have used a Poison Mushroom. This effect stacks with any Mushrooms acquired during the match.

Mega
Mega causes all characters to be as large as if they have used a Super Mushroom. This effect stacks with any Mushrooms acquired during the match.

Slow
Slow will cause the pacing of the game to become slow similar to the speed that can be set in Training mode.

Lightning
Lightning will cause the pacing of the game to become fast similar to the speed that can be set in Training mode.

Vampire
Vampire causes characters to heal themselves with 50% of the damage that they deal to their opponents.

Vengeance
Vengeance causes recoil damage to the player whenever they hit any opponent.

Freeze
Freeze causes all characters to be encased in a chunk of ice as if they were hit by a Freezie or an icy attack. Whenever a character is hit by any attack, rather than tumbling or reeling in the usual animation, he/she is encased in ice after being sent flying. Players cannot move while encased and must break free from the ice in order to move again.

Egg
Egg causes all character to be encased in Yoshi Eggs as if they were swallowed with Egg Lay. Whenever a character is hit by any attack, rather than tumbling or reeling in the usual animation, he/she is encased in an Yoshi Egg after being sent flying. Players can tilt themselves from left or fight while they are inside the egg and must break free in order to move again.

Dramatic
Dramatic makes each hit contact done will deal a lot of hitlag while the camera zooms in on who is being attacked.

Turbo
Turbo allow players to cancel a successful attack into any other attack, thereby allowing a combo chain that can result in Zero-to-death comboes.

Light
Light makes characters to experience more knockback then they should at certain percentages. It also increaces the players' jump height.

Heavy
Heavy makes characters to experience less knockback then they should at certain percentages. It also decreaces the players' jump height.

Invisible
Invisible causes the characters to appear and dissapear from the screen, while still being on the fight and capable of fighting.

Trivia

 * Turbo actually hails from Brawl mod Project M, which works exactly the same way. SSF2 Developers actually asked permission to Project M developers to use it.
 * Invisible is the only mode that does not have a opposite modifier.