From the word doppelgänger comes this Pokémon's name; the Shadow Pokémon Gengar. Some speculate that this Ghost/Poison Pokémon is the shadow of a Clefable, the Fairy Pokémon. The most famous features of Gengar is his sinister grin and his glowing red eyes.
In the Super Smash Bros. Melee, Mewtwo represented Pokémon's villain, just as Ganon and Bowser represented the villain in Legend of Zelda and Super Mario Bros. respectively. However, with the disappearance of Mewtwo from Brawl, the void has been left in the Pokémon villain spot. Gengar is here to fill that void.
Gengar is a medium weight character with the ability to wall cling. He is slow moving on the ground, however, his movement speed becomes fast in the air. He is about the same size as Wario but Gengar is a little bit taller. Gengar cannot crawl but one of his moves allows him to do it in a special way. When passing through a passable platform Gengar will turn transparent and just fall through.
: Shadow Ball
Gengar holds his hands in front of him and an orb of shadow starts growing. When fired, Gengar moves his arms to each respective side. The shadow ball itself is a powerful move dealing great knockback and good damage when fully charged. It travels in a straight line until it dissipates. Gengar can hold the charge making him able to surprise his opponents. When Gengar dies he loses any charge he had. Also, when Gengar's Shadow Ball is fully charged Gengar will start to emit a black shadowy aura notifying the player and the opponent that his move is fully charged.
: Shadow Claw
Gengar pulls his hand back and slashes in front of him with shadowy claws. Shadow Claw can weaken shields much better than normal attacks giving it a shield break quality. Knockback on a non-shielded opponent is able to kill at high percents. Shadow Claw's damage is also good. Using it in air does not slow forward momentum but it does slow backwards momentum.
Similar to R.O.B.'s Robo Burner and based off of Gengar's in game Pokémon ability, Gengar's Levitate will propel Gengar through the air for a short amount of time. Using it does not exhaust Gengar making it possible to use a Levitate before and after an attack, however he does have a limited amount of flight time before he touches the ground. When used Gengar turns into a shadowy blob having similar appearance to a Ghost Pokémon before obtaining the Silph Scope in Pokémon generation one. When he attacks, grabs a ledge, is attacked, or if Levitate is interrupted, Gengar will instantly revert back to his usual appearance.
: Shadow Sneak
Gengar melds into the ground or wall, leaving a puddle of darkness complete with black shadows crawling off it (like some shadowy aura), two sinister red eyes, and his trademark smile. Shadow Sneak only works for three seconds, cannot work in the air unless he is next to a wall, and must recharge for five seconds after each use. When using Shadow Sneak, Gengar moves a lot faster; barely surpassing Sonic's speed. Gengar can be knocked out of Shadow Sneak if he is attack, however due to the lack of size in this form, some attacks like Falco's Laser cannot hit Gengar. Shadow Sneak gives Gengar the mobility of a Hothead (Brawl Item); being able to go from the top of the stage to the bottom of the stage by traveling along the ground and walls. Gengar can attack out of this form. When in this form, Gengar can jump right out of the shadow by pressing the jump button. This can be followed up by any aerial move or special. Hitting an attack button when using Shadow Sneak will make Gengar jump out and with a shadowy mini blast that has decent range and knockback, however you cannot use one of your attacks directly after it leaving you vulnerable for a second.
: Shadow Force
Even though the move Shadow Force is reserved for Giratina, I thought it would be an appropriate Final Smash for the Shadow Pokémon. When used the screen will darken and Gengar will disappear into the darkness. Gengar will then appears right next to the closest opponent and attacks him with a shadow explosion. If any other opponents are near the explosion they will be hit also. Shadow Force deals both extreme damage and knockback.
: Gengar hovers above the ground with his head leaning forward.
: Gengar half way melds into the floor leaving his body in a shadowy puddle and his head right above the ground.
: Gengar half way melds into the floor leaving his body in a shadowy puddle and his head sticking out of the wall.
Grabbing: Gengar holds them in the air with telekinesis.
: Gengar sends a shadowy wave through the opponent.
: Gengar claps his hands sending the opponent flying forwards.
: Gengar moves the opponent through his body and sends the opponent flying backwards. The opponent takes shadowy damage when passing through Gengar.
: Gengar sends them flying upwards with a shadowy force.
: Gengar turns transparent and falls through the floor knocking the opponent against the ground sending the opponent skyward.
: Gengar thrusts out a shadowy hand.
: Gengar spins around creating dark purple flames around him.
: Gengar rams his head into the opponent.
: Gengar licks in the direction you pressed. This has a long startup lag but if it hits the opponent will be temporarily paralyzed.
: Gengar throws a shadow punch.
: Gengar kicks his feet back.
: Gengar headbutts the space above him.
: Gengar will clap his hands above him creating a small dark explosion.
: Gengar juts his hands up in the air.
: Gengar quickly slashes in front of him then behind him.
Down Tilt/Crouch Attack
: Gengar grabs the feet of the opponent. This will cause always cause a trip if the opponent is on the ground. If the opponent is in the air then this attack will send the opponent down.
: Gengar kicks the space below him. This move will spike.
: Gengar headbutts the opponent.
: Gengar melds into the floor and jumps back out creating a small shock wave.
Ledge Attack #1
: Gengar will go right through the corner of the stage and slap the opponent.
Ledge Attack #2
: Gengar will float onto the stage and slap the opponent.
: Gengar turns partially invisible. Anything and everything except for the stage passes right through him. This lasts longer than most dodges.
: Gengar floats backwards and becomes partially invisible. Just like above, anything and everything except for the stage passes right through him. This lasts longer than most dodges.
: Starting invisible, Gengar flashes in and out of visibility until visibility slowly crawls its way up from his feet to his head. When this is happening Gengar is staring at the screen with his usual grin on his face.
Victory Pose #1
: Gengar will grin menacingly at the screen and disappear with his smile disappearing last.
Victory Pose #2
: Gengar will use hypnosis and all the other characters will fall asleep. Gengar will be awake silently laughing.
: Gengar will put on a very evil smile and his shoulders will move up and down like he is laughing but no sound will be made.
: Gengar will shimmer in and out of visibility never at one point becoming fully invisible.
: Gengar will become a blob of shadow and fall into the ground and pop back up in purple fire.