Final Smash Meter

The Final Smash Meter is a feature in Super Smash Flash 2 accessible from the Rules menu. It displays a colorful meter below each player's damage meter that allows players to unleash a Final Smash when fully charged. A player's meter charges when dealing or taking damage, the latter of which charges it faster. In particular, it fully charges upon dealing 500% damage or taking 200% damage, though recoil damage does not charge the meter. It also slowly fills over time, taking about 9 minutes and 13 seconds to fill completely, and fully charges upon breaking a Smash Ball.

Once a player fills their meter, a colorful aura flame appears on the character and their neutral special move is replaced with their Final Smash, much like when breaking a Smash Ball. The meter empties completely after the Final Smash is used. It also depletes if the player is KO'd when fully charged, depleting to 60% of its charge if the player has the highest score or 90% if otherwise, and empties completely if a Smash Ball is obtained and then lost. It also depletes slowly while certain Final Smashes are active, serving as a visual indicator of how long they last, and empties completely if the player is KO'd during their Final Smash.

Although it is possible for multiple players to have fully charged meters simultaneously, only one Final Smash may be active at a given time. Players attempting to use their Final Smash while another player's Final Smash is active will use their neutral special move instead.