Leah Needlenam (commonly known as just Leah, labelled as The Multiverse's Greatest Traitor) is a newcomer fighter exclusively introduced in SV²per Smash Bros. Calamity. Born as Sarah Auvic to a slowly-tearing-up mother and father, she was kidnapped by the Twisted Cross and made her a part of the deranged cult, working for them over the years. She's known for her sociopath behavior and only cares about herself, and one girl she just so happened to fall in love with, "X-Ray".
Due to Leah being a new inclusion to the Super Smash Bros. series, she has no changes of any kind whatsoever.
|Jab||Combo||Leah does a three-hit combo with her fists, ending with a finger needle injection.||2%, 3%, 4%|
|Side tilt||Back kick||Leah does a back kick.||10%|
|Side smash||Precision Cut||Leah does a quick slash with a surgical knife. It is quick, but its range is pathetically terrible, and managing to make the move connect will deal heavy damage and knockback, and even having freeze frames when it connects. Based on her neutral special in Fantendo Smash Bros. Victory.||17% (uncharged)|
25% (fully charged)
|Up tilt||Handstand kick||Leah does a handstand kick.||8%|
|Up smash||Suitcase swing||Leah gets out a suitcase and swings it upwards.||15% (uncharged)|
23% (fully charged)
|Down tilt||Slide kick||Leah does a slide kick.||7% (clean)|
|Down smash||Suitcase Spin||Leah spins around with a suitcase in hand, hitting on both sides. Based on her down attack in Fantendo Smash Bros. Victory.||14% (uncharged)|
19% (fully charged)
|Dash attack||Butcher||Using a kitchen knife, Leah butchers forward while sliding a short distance forward. Based on her "Precision Hack" Erringear Move in Fantendo Smash Bros. Victory||14%|
|Neutral air||Aerial flip||Leah does a flip, hitting with her legs.||11% (clean), 8% (early), 5% (late)|
|Forward air||Kneejerk kick||Using a kneejerk hammer, Leah hits her knee, causing her to kick forward.||3% (hit 1)|
6% (hit 2)
|Back air||Stretch kick||Leah does a behind stretch kick.||12% (clean)|
|Up air||Flip kick||Leah does a front-flip, kicking above her.||8%|
|Down air||Suitcase smash||Leah smashes downwards with a suitcase, strongly meteor smashing opponents when hit clean.||15% (clean)|
|Grabs and throws|
|Grab||Leah reaches out for the opponent.||N/A|
|Pummel||Open wound||Leah slashes at her opponent with her surgical knife. Relatively slow.||3%|
|Forward throw||Drop kick||Leah does a drop kick, sending her grabbed victim away.||4% (hit 1)|
|Back throw||Behind throw||Leah throws her opponent behind her.||11%|
|Up throw||Bleeding Skull||Leah throws her opponent above her and gets out a skull that spews out red ghosts above, speaking a Shakespearean line.||3% (throw)|
|Down throw||Stomp||Leah shoves the opponent on the ground and stomps on them.||5% (hit 1)|
|Neutral special||Lethal Injection||Leah thrusts her needle pinkie finger forward, injecting her opponent with a random type of poison loaded into them and a colored-anthrax symbol briefly flashes on the opponent. The needle breaks after a set amount of uses (when the needle finger connects).
|Side special||Sanguine Slide||Leah briefly flashes red and does a quick dash forward, slashing with her surgical knife. Can increase the distance traveled, damage dealt, start-up lag, and recovery time of the move by holding down the special button. Leaves Leah helpless when used in the air.||6% (not held)|
|Up special||Body Bag||Leah seals the nearest opponent inside a body bag, leaps upwards with it and slams them back down. In the air, this leaves Leah helpless, though tapping the special button will cause her to use the body bag as a cape and rises upwards with it, slowly floating downwards afterwards.||2% (seal)|
|Down special||Needle Switch||Leah switches to the next needle in the switch sequence. The sequence goes as this: Red, Blue, Green, Purple, and Orange; rinse and repeat. After one type of poison is chosen, a colored-anthrax symbol briefly flashes near Leah.||0%|
|Final Smash||I-N-J-E-C-T-O-R||Leah transforms into her Hyper Mode form, and uses her giant syringe, named I-N-J-E-C-T-O-R, to inject her opponent, loading them with the current selected poison and inflicting heavy knockback on them.||13% (transformation)|
35% (I-N-J-E-C-T-O-R injection)
- Leah's neutral special shares the same name as Dr. Needlenam's neutral special from Fantendo Smash Bros. Omega.
- Leah's forward aerial, Sanguine Slide, and Body Bag function similarly to Valentine's aerial medium punch, Savage Bypass, and Mortuary Drop moves, respectively, in Skullgirls. Using Body Bag alternatively is similar to one of Valentine's pre-fight intros in the aforementioned game.