Asleep
Being asleep (known as FuraSleep by the games' internal files, with "fura" being the Japanese onomatopeia for dizziness) is a status condition in every Super Smash Bros. game to date, which is inflicted by attacks with the sleep effect. A character that falls asleep is prevented from taking action until waking up or getting hit by an attack.
General properties
Any fighter on the ground hit by an attack with a sleep effect will be put to sleep. In the air, characters cannot be put to sleep prior to Super Smash Bros. 4; from this game onward, a few sleeping moves are allowed to hit aerial opponents, namely Peach's Peach Blossom and the Hero's Snooze, in which case the opponent is instead put in an inactionable tumble state, transitioning into their sleeping animation if they land on the ground.
Sleeping characters cannot take any action until waking up, though they can decrease its duration by button mashing, and it ends prematurely if they take any kind of knockback, or if the ground they are standing on disappears. As with other status conditions, its duration increases proportionally with the target's damage percentage.
In Super Smash Bros. for Wii U's Smash Tour, the tour item Darkrai causes an opponent to be asleep at the start of the battle. In Ultimate, the slumber floor Spirit Battle condition causes a stage's floor to put players (but not opponents) who stand on it to sleep. Conversely, the support spirit skill Slumber Immunity prevents the equipped fighter from falling asleep.
Uniquely, Donkey Kong cannot fall asleep while carrying a heavy item. Additionally, he cannot fall asleep while carrying an opponent in Brawl, but he can in Melee.
Appearance
In the original Super Smash Bros., Jigglypuff's Sing is the only way characters can be put to sleep. The animation for sleeping characters is also the same as the animation for getting stuned, except the sleeping character flashes different colors, has musical notes around them, and uses different a voice clip to indicate being asleep, such as Mario using his snoring voice clip from Super Mario 64.
From Melee onward, all characters have a unique sleeping animation, as well as an animation for waking up. For example, Donkey Kong rocks on his back and puts his thumb in his mouth, and Fox curls up on the ground like his real-world animal counterpart. In Ultimate, Steve takes out a Bed from Minecraft and lies upon it, then breaks it and places it back in his inventory upon waking up. Sleeping characters also flash magenta, and emit stylized "bubbles" from their faces. In Melee, Mr. Game & Watch emits stylized Z's instead of bubbles; from Brawl onward, both the bubbles and Z's are shown.
In Melee only, Mario, Luigi, Dr. Mario, Captain Falcon, Sheik, Yoshi, Bowser, Ganondorf, Young Link and Mr. Game & Watch emit their stun voice clip upon waking up without being interrupted by knockback. Starting with Smash 4, most newcomers and a number of veterans also have a similar (albeit unique) voice clip, often being a gasp or a quiet breathe; in Smash 4, this applied to most voiced newcomers (with the exception of Rosalina & Luma, Greninja, Bowser Jr., Lucina, Dark Pit and Duck Hunt) plus Mewtwo; Ultimate adds all voiced newcomers from that game (minus Inkling and Ridley; including Daisy and Chrom, whereas their base counterparts don't have one), as well as Link, Young Link, Zelda, Ganondorf, Wolf, and the Mii Fighters.
Sleep duration
As mentioned prior, the amount of time characters remain asleep increases proportionally to their percent, but can be reduced by button mashing from their part. Additionally, from Melee onward, characters have an animation for waking up that cannot be interrupted (known as FuraSleepEnd internally), effectively adding extra vulnerability time. This animation generally lasts 60 frames (exactly one second), though prior to Ultimate, it is different for a few characters; it lasts 50 frames for Mewtwo in Melee, 76 frames for Kirby and Jigglypuff from Melee to Smash 4, and a much shorter 30 frames for Squirtle in Brawl. In Smash 4 and earlier versions of Ultimate, the duration was either 59 or 60 frames for the rest of the cast, which was completely standardized to 59 frames since version 4.0.0 of Ultimate.
In Smash 64, sleeping works differently from every other game in that its duration decreases when the opponent is at higher percents, much like getting stunned from a shield break. Additionally, characters do not have animations for waking up, allowing them to initiate other actions immediately after their sleep duration ends. In this game, the formula for sleep frames is (300 - p) + 75, rounded down, where p is the character's damage percent after the sleeping move hits, and button mashing reduces this duration by 4 frames per input. This makes it more or less the same as the formula for stun frames, except with a lower base duration and reaching its limit faster (when the opponent has at least 300% damage).
In Melee, the formula for sleep time is 95 + p * 2 - h, where p is the same as in Smash 64, and h is a handicap equal to 15 if the victim has less stocks or points than the user (depending on battle mode). As a result, players that are currently losing will be put to sleep for slightly less time, and the minimum possible sleep time without button mashing can be either 95 or 80 frames. Button mashing reduces sleep time by 6 frames per input.
From Brawl onward, the formula is changed to 10 + 30 * h + 10 * (3 - r) + KB * 25 + p, rounded up, with the factors corresponding to the following:
- h and r are both placing factors much like the one used in Melee, but they make sleep time even more variable based on the user and victim's stock difference (or points in a time battle). h (handicap) is equal to 1.225 if the user is one stock behind the opponent, 1.45 with two or more stocks behind, 0.5 with one stock ahead, and 0.25 with two or more stocks ahead. On the other hand, r (rank) is equal to 0.32 if the user is one stock ahead of the opponent, and 0.4 with two or more stocks ahead. If both characters' stocks (or points) are equal, h is equal to 1, while r is equal to 0.
- To summarize, characters put opponents to sleep for 7 more frames with a -1 difference in stocks (or points), 14 more frames with a -2 difference or higher, 18 less frames with a +1 difference, and 26 less frames with a +2 difference or higher.
- KB is the numerical knockback amount inflicted by the sleeping attack, using a weight of 100 for every character.
- Button mashing reduces sleep time by 8 frames per input (14.4 for buttons in Smash 4 and Ultimate, but they cannot be inputted as quickly as stick inputs).
Contrary to common misconception, Jigglypuff's Rest does not inflict the asleep status on it, and thus cannot be ended faster by button mashing; it is simply extremely high ending lag manifested through a sleeping animation.
Gallery
Mario sleeping in Smash 64
Donkey Kong sleeping in Melee
King Dedede sleeping due to Negative Zone, Luigi's Final Smash in Brawl
Mario falls asleep from Jigglypuff's Sing in Brawl
Jigglypuff putting Charizard and Pikachu to sleep in one of Jigglypuff's Wii U pictures on the Super Smash Bros. 4 website
Mr. Game & Watch sleeping in the 3DS version of Super Smash Bros. 4
Mr. Game & Watch and R.O.B. sleeping in Super Smash Bros. Ultimate
Trivia
- Richter has a voice clip where he mutters "Dracula..." while sleeping that can be heard in the Sound Test, but in the game the voice clip loops before the muttering can be heard.
- The voice clip doesn't loop if Richter is put to sleep by Hero's Snooze while he is in the air, but the duration is too short for it to be heard fully.
- When Steve is sleeping, he lies on a red bed taken from Minecraft. When he wakes up, he collects it back in his inventory.
