Zero Suit Samus (SSBB)
Zero Suit Samus (ゼロスーツサムス, Zero Sūtsu Samusu), often abbreviated as ZSS, 0SS, or Zamus, is a character that appears in Super Smash Bros. Brawl. Zero Suit Samus lacks stamina compared to when she is in her suit, but is faster. She uses a gun known as the Paralyzer, which can be converted into a Plasma Whip. The Plasma Whip can be used for a tether recovery, similar to her Grapple Beam while in the power suit. The only two games in which Zero Suit Samus is playable are Metroid: Zero Mission and Metroid: Other M. While Samus is without her power suit in these games, her only form of attack is the paralyzer pistol, which does nothing but shoot paralyzing shots. The idea of a whip coming out of it was created for use in Brawl. Zero Suit Samus is voiced by Alésia Glidewell, who also voices Krystal from Star Fox and the Assist Trophy Knuckle Joe.
The impact from Samus's Final Smash is enough to remove her Power Suit, transforming her into Zero Suit Samus. Zero Suit Samus is able to transform back into normal Samus by using her Final Smash, which causes her to get her suit back while performing a move similar to the Crystal Flash from Super Metroid.
Zero Suit Samus ranks 9th in the B Tier on the current Brawl tier list; she has an amazing aerial and juggle game, possessing very high jumps and low-lag aerial attacks that do good knockback and damage, with her back aerial being especially useful. She also has very fast mobility, noticeable especially in her jumps, and some of the game's most versatile recovery options, including her midair jump, side and up specials, and down special. Zero Suit Samus also has an effective spacing tool in her Plasma Whip (albeit not being very fast), powerful KO options, such as her back aerial, Plasma Whip, and Flip Jump, as well as a great combo starter and KO setup in her down smash. Her Power Suit Pieces, in addition, are among the most powerful items in the game, and at the beginning of a match are very effective at damaging and shutting down the opponent. However, she has a poor ground game, with her tilts and smashes doing below average damage and mediocre knockback (though some of her ground attacks are still effective for combos), and a grab that despite its range, is one of the laggiest in the game, even when used as a pivot grab (unlike some other tether grabs). Because of this, her out of shield and defensive game (outside of maneuverability) are poor, due to lacking safe options on shield (her grab is unreliable due to its heavy lag), making herself prone to heavy shield pressure, and despite her good air game, she lacks reliable options for enemies below her; this can make her vulnerable to juggling from characters such as Meta Knight. Zero Suit Samus is additionally reliant on tether recoveries that can be edgehogged, although her high jumps and Flip Jump make her suffer less from this than other characters with tethers. Her advantages lead to rather above average matchups across the board, but this also causes her to suffer against higher-tiered characters, and Zero Suit Samus has achieved some strong tournament results.
 Transforming from Samus to Zero Suit Samus
Samus can remove her Power Suit while in battle by doing the up taunt, down taunt, and up taunt in quick succession. It appears to be rather difficult to achieve, as DOJO!! states, "It's not easy [...] Try it out next time you feel like showing off."
 Starting as Zero Suit Samus in Brawl
By choosing Samus and holding a certain button on the controller when the character selection is concluded (i.e. start is pressed on the character selection screen), one can play as Zero Suit Samus from the start of the match.
To select Zero Suit Samus as a CPU opponent, there must be a controller connected to the slot of the respective CPU opponent. Then, in that controller, the right button needs to be held in the same fashion.
After the character selection is concluded, there is no longer need to hold the button. One can confirm that Zero Suit Samus has been chosen by her face on the top-left corner on the stage selection screen. In Wi-Fi, the characters' faces don't appear, but Zero Suit Samus can still be selected normally.
 Starting as Zero Suit Samus in Adventure Mode
After Samus regains her power suit during the Subspace Emissary, Zero Suit Samus can still be selected by highlighting Samus on the character select screen and pressing the following buttons:
This technique can also be used to select an alternate form during tournament mode, and works for all other multi-form characters in addition to Samus.
Zero Suit Samus is a fast and strong, but lightweight and tall character. She starts the match with a huge advantage over most characters in that she has readily throw-able projectiles that are extremely powerful and combo well with her glide toss. She can dash quickly, crawl, wall jump (but has poor air speed), combined with one of the highest initial jump and second jump, allowing her to reach characters that are higher. Many of her attacks have the advantage of coming out fast, and can combo most heavy weights with her aerials very easily.
Her side special has a huge sweetspot at the end (one of the biggest in the game, second to Zelda's side special) and the sour spot has the ability to push the opponent into the sweet spot, effectively KOing most characters around 110% if it's not stale. Her down smash has deceptively long range, and sets up many combos, as well as KOing ones. Zero Suit Samus is unique in the fact that many of her moves have large hit boxes and easy to hit sweet spots, this can devastate opponents as they are dealt a barrage of aerials and fast ground attacks. Her up smash is excellent because it has fast start-up and its great to stop incoming opponents from above and puts them in good position for juggling.
Another great KO'ing move is her up aerial, a very fast flip kick that can KO as low as 90% if opponent is near the upper blast line and a very large sweetspot for such a powerful move. Both of her high jumps compliment this strategy. It is most often used to combo with a down throw or an up smash. She also has 3 meteor smashes, her flip jump kick, if hit when she sticks her foot out, will spike opponents hard (even without doing this, the kick is still very powerful and can KO most characters at fairly moderate damage percentages with strong horizontal knockback), her up special, if hit at the tip, will meteor smash anyone it hits and her down aerial (although this is an unreliable spike). Both of these can be used for any situation, making her KO options very wide.
Zero Suit Samus, if mastered, is extremely dangerous and many characters can find themselves down a stock or worse if they aren't careful. However, Zero Suit Samus is a light character. Her attacks and combos require a lot of precision which makes her a difficult character to learn and play effectively. The stale move negation can complicate her to get a KO, although she has enough KO moves and good edgeguarding skills to prevent that to happen. All of her tilts are quick, with decent range, and have the added bonus of launching her opponents into the air. She has a situational though passable out of shield game (making herself prone to heavy shield pressure). Her aerial game is powerful with lethal kicks and long-ranged attacks, but her very high short hop makes approaches with aerials difficult. Her projectile, the Paralyzer, can set opponents up for KO's and does a little bit of damage. However, it's slow and needs to be charged up to go far. Her tether grab has incredible range (tied with Olimar´s Red Pikmin, only losing to White and Blue Pikmin, although her grab possesses the longest range in aerial opponents), but it leaves her vulnerable if it misses which is dangerous for a such light character. Her smashes compliment her perfectly. Her up and down smashes are useful for their range. The down smash is perfect for set up KO's, and the up smash makes for an excellent launcher, and can stop opponents' midair combos, while her side smash is quite weak, in terms of damage and power, with high ending lag and considerable start-up lag, but with good range. In terms of recovery, she can use her Plasma Wire and Whip as a tether recovery, but it can be stopped by edge-hogging, although due her air speed and second jump being fairly high and combining with flip jump she can usually come back to the stage without relying on her tether.
 Ground attacks
Coincidently, every one of Zero Suit Samus's throws consist of two hits.
 Special moves
Zero Suit Sa-mus!
 Brawl manual description
Samus in her unarmored form. Her physical abilities far outclass standard humans.
 In competitive play
Zero Suit Samus is soft countered by six characters, has eight even matchups, soft counters thirteen characters, counters six characters, and hard counters three characters. She has five disadvantageous matchups, two even matchups, and one advantageous matchup against other top/high tier characters. According to the current SWF matchup chart, her matchup spread has the eleventh highest unweighted rank, tenth highest total, and the eleventh highest weighted total. Zero Suit Samus tends to do well against characters who she can juggle and beat in the air easily, as well as characters who lack considerable range and ability to counter her great movement speed, but has trouble against characters with good projectiles, especially if they have a reflector to counter her Power Suit Pieces, most notably Falco, who has a very useful projectile and a ranged reflector. ZSS also has a bit of trouble against characters who can space against her easily, such as Marth who can do so on the ground and in the air alike. She has a notable advantage against the Ice Climbers as she can outspace them with her Plasma Whip to avoid getting grabbed as easily.
 Notable players
 Tier placement and history
Zero Suit Samus was originally a mid tier character, ranked 21st on the first tier list (September 2008). However, as Zero Suit Samus mains such as Snakeee and Nick Riddle showed how effective her aerial game and combo abilities are, she rose to 16th place on the second tier list (January 2009), then stayed at 15th until the fifth tier list (September 2010), where she jumped into the high tiers, at 13th place. She rose again to 12th in the sixth tier list (July 2011), and 10th in the seventh list (April 2012). Due to Salem winning Apex 2013 using only ZSS, she rose to 9th place in the eighth and current tier list, as of April 2013. Some people even believe that she belongs in the bottom of the top tiers; whether her current position is accurate or should be higher has been disputed.
 Role in The Subspace Emissary
Zero Suit Samus is first seen breaking into the base of the Subspace Army. Soon she comes across Pikachu being drained of its electrical power. Samus uses her whip to break the container the Pikachu is being held in, summoning a security force of R.O.B.s. Later, she comes across her Power Suit, but is confronted by two Shadow Bug clones mimicking the Power Suit.
After reacquiring her Power Suit, Samus and her new companion Pikachu come across Ridley. He grabs Samus and starts to drag her against the wall, until Pikachu returns Samus' favor and uses Thunder on Ridley, causing him to drop Samus. An infuriated Ridley attacks. Once they defeat him, the duo exits the base and come across a cave.
Samus and Pikachu make their way to the Subspace Bomb Factory and find the Ancient Minister with the R.O.B. Squad. They prepare to fight, but then realize that he looks very sad. Soon, Captain Falcon, Olimar, Diddy and DK find the factory and enter. A hologram of Ganondorf appears and orders the R.O.B. Squad to activate the Subspace Bombs in the factory. The Ancient Minister tries to stop them, but is set on fire when Ganondorf orders them to retaliate. After The Ancient Minister is revealed to be a R.O.B. himself, the characters set out and all join the quest.
Samus helps fight Meta Ridley, flees the island, is defeated by Tabuu and revived by the others. She can help to defeat Tabuu in the end.
 Playable appearances
After Zero Suit Samus reclaims the Samus suit, the players have the option to use her Zero Suit form in other levels.
Since Samus and Zero Suit Samus share the same trophy base, there are some cases in which certain stickers will not affect one of them. Since Smash Balls don't appear in Adventure Mode, if one transforms into Zero Suit Samus, they will be unable to change back until the end of the level (or, in The Great Maze, a save point). Aside from use of items, only Leg, Weapon, and Energy stickers will affect both characters. That said, all of Zero Suit Samus's moves are comprised of Leg or Weapon attacks barring the first hit of the jab, Forward Throw and Down Smash.
Her Power Suit falls off as she stands up. Power Suit pieces can then be used as throwing items.
 Trophy description
"Samus Aran without her mighty Power Suit. In this condition, she does not have the firepower she's famed for but is in full possession of the agility and athleticism she gained through her childhood training with the Chozo. Without the armor, she's also much, much faster. The weapon she carries is a self-protection device known as a Paralyzer that stops enemies cold."