Difficulty

Difficulty is an option in various Solo game modes in the  series that allows a player to adjust the game after one's skill. Depending on what mode is being played, different difficulty levels will affect the game in different ways.

In Super Smash Flash
In the original Super Smash Flash, difficulty can be adjusted in Classic, Adventure, and All-Star. There are five difficulty levels, with Very Easy being the lowest and Very Hard being the highest, in which higher difficulty levels include higher levels of intelligence for computer players. Additionally, certain unlockable characters can only be unlocked by clearing modes on specific difficulties, and there is also a bonus called "Very-Hard Clear" worth 200000 points that can be obtained by clearing a mode on Very Hard difficulty. The five different difficulty levels are, in ascending order:
 * Very Easy
 * Easy
 * Normal
 * Hard
 * Very Hard

In Super Smash Flash 2
In the reboot, Super Smash Flash 2, difficulty can be adjusted in Classic and All-Star. There are now only four difficulty levels, with Easy being the lowest and Insane being the highest, in which higher difficulty levels include higher levels of intelligence for computer players and fewer stocks are available to the player. In addition, the mini-boss encountered on level 9 depends on the difficulty, with a random metal character on Easy or Normal and the Metal Bros. on Hard or Insane. Like in Super Smash Flash, certain unlockable characters and unlockable stages can only be unlocked by clearing Classic on specific difficulties. The four different difficulty levels are, in ascending order:
 * Easy
 * Normal
 * Hard
 * Insane