Wall jumping

The wall jump was originally a technique that was introduced in Super Smash Bros. Melee, and was temporarily included in Super Smash Flash 2. As the name states, wall jumping allows characters to jump off a wall and gain momentum. The feature was removed entirely in version 0.9b of the Super Smash Flash 2 Demo.

In Melee, wall jumping is performed by tilting the control stick in the opposite direction of the wall. However, in Super Smash Bros. Brawl,, wall jumping is performed by pressing jump while next to a wall. Both ways were implemented in SSF2, albeit trying to do the former method would not work if the player was not moving away from the wall.

and were the only characters able to wall jump in Super Smash Flash 2, and could perform the technique from demos v0.8a to v0.9a on the walls of Central Highway and, in v0.8, Twilight Town. While wall jumps could be done infinitely, every jump would be weaker than the previous one.

Trivia

 * Wall jumps reused the characters' first jump animation.
 * Sonic had a bug where, if he tried to wall jump after having already used his midair jump, said wall jumps would have no animation at all. If Pikachu tried to wall jump while helpless, he would perform the wall jump animation but would keep falling.
 * Oddly, unlike gliding and hovering — other removed mechanics —, wall jumping was not manually removed, but instead, it gradually disappeared as the stages where it was possible were resprited. It is possible that the mechanic's inclusion and removal were both oversights.