Rebellion Gauge

The Rebellion Gauge is 's fighter ability in Super Smash Bros. Ultimate. Filling the gauge unleashes Arsène, Joker's Persona, granting him increased attack power and an alternative recovery move in Wings of Rebellion.

Overview
The Rebellion Gauge is a gray meter with a black frame, which is present next to Joker's portrait at all times. By default, it has a red splash around it, but if the match is in Mementos and Persona 3 or Persona 4 music is playing, the splash's color changes to blue or yellow, respectively. As the Rebellion Gauge fills, the gray is replaced with pink.

Charging
The Rebellion Gauge slowly fills over time, but can be more efficiently filled by (in increasing order of effectiveness): one of Joker's teammates being KO'd, one of Joker's teammates being attacked, Joker himself being attacked (which causes a spark matching the color of the splash at the right end of the Gauge), and Joker being attacked while using Rebel's Guard.

When the meter is filled, Arsène is summoned and the Rebellion Gauge turns cyan with blue flames behind it. Joker's mask also disappears while the Rebellion Gauge is in effect. Arsène remains active to boost Joker's abilities until the Rebellion Gauge runs out, which takes 30 seconds. Taking damage causes larger portions to be removed. Once the Rebellion Gauge depletes fully, Arsène leaves Joker and the meter resets to its default state. Joker is invincible during the animations in which Arsène is summoned and when he leaves.

In Home Run Contest, the Rebellion Gauge starts out full and does not deplete, so Arsène will always be active.

Move changes
When Arsène is active, in addition to Grappling Hook being replaced with Wings of Rebellion, his hitboxes are added to almost all of Joker's standard attacks, with the exception of Joker's pummel, throws, and floor and edge attacks. Arsène's hitboxes have a part of 1, meaning that they hit simultaneously with Joker's own hitboxes. In some cases, Joker's hitboxes may miss while Arsène's still connect, and vice versa, exposing the discrepancy. This is most commonly seen with the outer reaches of back aerial.

Joker's own hitboxes deal the same damage as when Arsène is not present, but might have other properties like size, knockback or angles changed; these are colloquially referred to as "Awakened Joker" hitboxes. Curiously, if Arséne vanishes while Joker is performing an attack, the Awakened values will apply until the attack animation ends.

Halting charge
Several instances can temporarily halt the depletion of the activated Rebellion Gauge. These include:
 * Joker getting stunned:
 * By his shield being broken.
 * By a Deku Nut being used on him.
 * By using Disable on him.
 * By Rathalos roaring right next to him.
 * By Marshadow trapping him.
 * Joker falling asleep.
 * Entering any cannon, such as:
 * The Barrel Cannon on Kongo Jungle (SSB) or Kongo Falls.
 * The cannons in The Great Cave Offensive.
 * The cannons in a Stage Builder level.
 * Getting trapped in a barrel in Wrecking Crew.
 * Using a.
 * Another player landing a cutscene Final Smash, such as Stampede! or Blue Falcon. This applies even if Joker is caught in the move, although damage taken will still reduce his Rebellion Gauge.

Technical data
The Rebellion Gauge fills passively at 0.00925 units per frame. When the Rebellion Gauge reaches 100 units, Arsène will appear for 30 seconds (1800 frames). It takes roughly 3 minutes (10,810 frames) for the gauge to fill solely through passive generation. The gauge only fills when Joker is not on a revival platform.

To increase the speed on which the Rebellion Gauge fills, it can also be accumulated through taking damage. All calculations involving the Rebellion Gauge will take the 1v1 multiplier and other damage multipliers into account. Here, the Rebellion Gauge is filled with 1.3× the damage Joker receives. For example, a move dealing 3% will fill the gauge by 3.9 units. Therefore, taking around ~77% summons Arsène instantly. This damage mechanic also applies to teammates, though it is filled by 0.2× the result. If Joker uses Rebel's Guard, the amount is decreased by 0.4× (due to Rebel's Guard) but also increased by 6.7368× for a final formula of, instantly filling it after taking 28.6% damage or more.

If Joker is hit while Arsène is summoned, the Rebellion Gauge will decrease by 16× the damage received in frames if two or three players are present. A move dealing 15% in a 1v1 battle will subtract 240 frames (4 seconds) from the Rebellion Gauge. Depending on the number of players in a match, the multiplier for the depletion of the Rebellion Gauge changes; it will use a 10.2× multiplier for a 4 players match, 8.6× for 5 players, 7.8× for 6 players, 7× for 7 players, and 6.3× for 8 players.

If Joker is KOed at any point, the meter will reset at 20 units regardless of how filled it was beforehand. His meter resets to 25 units if he has 2 fewer stocks than his opponent and 30 at 3 or fewer stocks. The gauge fills by 4 units if an ally is KOed.

Origin
The Rebellion Gauge is functionally unique to Super Smash Bros.; in the series, Personas could be summoned at will after their user has awakened them so long as the user has enough SP to spend for the selected attack, said SP functioning as it usually does in role-playing games. It has been theorized that the mechanic of the Rebellion Gauge is instead meant to invoke the process of awakening one's Persona, which in Persona 5 came from finding resolve in the face of extreme hardship. Thus, being on the defensive through most of the match could be seen as evocative of said moment, while Arsène appearing to grant Joker the power needed to turn the tide in his favor is evocative of him gaining the resolve to triumph over it.

When Arsène is active, the Rebellion Gauge's color fittingly matches that of the HP gauge in Persona 5. Otherwise, it matches the color of the SP gauge.

Trivia

 * If Joker is in Training Mode, increasing his damage percentage through the menu has an immediate effect on his Rebellion Gauge. This can be most easily noticed by setting his damage from 0% to 999%, in which case his Rebellion Gauge will fill or empty instantly. Decreasing his damage has no effect.
 * Prior to, if Joker and were on the same team and the Pokémon Trainer switched Pokémon after being damaged, the Rebellion Gauge would receive a substantial boost in meter. This occurred because the game believed that the switched Pokémon was a new character, and filled the meter in order to compensate. This technique has been banned by many tournaments in doubles. This was reintroduced into the game with the addition of  and , but only works with a damage handicap of at least 100%.