Final Smash Meter
Final Smash Meter (チャージ切りふだ, Charge Trump Card) is a feature in Super Smash Bros. Ultimate, available as a toggle in the Rules selection, which was revealed during the Super Smash Bros. Direct on August 8, 2018. It allows players to have a chargeable meter and unleash a weaker Final Smash when the meter is filled. It is similar to Super Meters from traditional fighting games. Certain Spirit battles will have the opponent's Final Smash Meter grant a full strength final smash.
When the Final Smash Meter is turned on, a colorful bar is present below each player's damage meter. The bar fills as a player gives and receives damage, similarly to Little Mac's Power Meter mechanic; the meter will reach full charge after taking 200% or dealing 500%. Additionally, the meter will slowly fill up with time, taking 9 minutes and 16 seconds in total to fully charge without taking or dealing any damage (this is shortened to 6 minutes and 26 seconds with one Fast Final Smash Meter skill and down to 6 minutes and 12 seconds with two Fast Final Smash Meter skills). Recoil damage will not charge the meter at all, besides the slow charging from time passing.
Once a player fills their meter, they will enter Final Smash standby, and can unleash a less powerful version of their Final Smash compared to the regular version that is used with a Smash Ball. If a player breaks the Smash Ball, the meter will fill instantly and the player can use their Final Smash at full power. In either case, the meter will empty completely after the Final Smash is used. The meter will also deplete to around 60% charge if a player is KO'd while in standby, or to around 90% if they are currently losing, and will deplete completely if the Smash Ball is obtained and subsequently lost, regardless of how much the meter was filled beforehand. Starting with version 4.0.0, the meter will also deplete over time once filled, with the Final Smash being lost if it drains completely (taking twenty seconds), similar to Cloud's Limit Break. This change doesn't affect the Final Smash Meter in Spirits mode, nor does it apply to Final Smashes obtained from a Smash Ball.
This feature does not allow multiple players to use a Final Smash at once, even though multiple players can be in standby at the same time. While a Final Smash is in progress, other characters with full meters will appear to leave standby, and will use their regular neutral special move instead, re-entering standby once the first Final Smash concludes.