Shadow the Hedgehog
Shadow the Hedgehog (シャドウ・ザ・ヘッジホッグ, Shadow the Hedgehog) is a character from the Sonic the Hedgehog series who, like Knuckles the Echidna, is a rival of Sonic the Hedgehog. He is a hedgehog known as the "Ultimate Lifeform." He has his own game that mainly features him, the self-titled Shadow the Hedgehog, which was released in 2005 for three out of the four major sixth-generation consoles (the lone exception being the Sega Dreamcast, which was discontinued before Shadow the Hedgehog was planned). Since his debut, he consistently holds second place as the most popular character in the franchise, trailing the eponymous character. Unlike his heroic counterpart, Shadow is a much darker and developed character, willing to do whatever it takes to reach his goals. However, in recent games, he has become a somewhat lighter, anti-hero character. In Smash 4, Shadow is also voiced by a different voice actor in the PAL versions (depending on the region), similar to Sonic.
Shadow the Hedgehog first appeared in Sonic Adventure 2 as one of the main antagonists, but towards the end as a protagonist, and has appeared in numerous Sonic games since. He was created by Gerald Robotnik on the Space Colony ARK to be the ultimate lifeform as the result of a successful government medical project called Project Shadow, which had the goal of finding a way for life to be immortal. Soon after his completion, the government began to fear his power and tried to kill everyone involved with the project; however, Shadow was able to make it to the escape pod thanks to the help of his close friend, and Gerald's granddaughter, Maria Robotnik, who was soon killed also. He is Sonic's arch-rival, but they have become allies on few occasions mainly due to Shadow's role as more of an anti-hero with inherently good intentions after his character has been more deeply explored.
In the Sonic series, Chaos Control is a technique that allows the user to warp through space and stop time through the manipulation of the fabric of spacetime. The user needs at least one Chaos Emerald and the strength of Chaos Control is increased with each Chaos Emerald added until being maxed out with all seven. Shadow was one of the first to utilize the technique with other characters also learning how to perform it as time went on. In Sonic Adventure 2's two-player mode, Chaos Control can be used by Shadow to stop time and "freeze" the opponent while he moves at normal speed. Chaos Control was also used to slow down time in Sonic Heroes and when fighting against a boss in Shadow the Hedgehog. In the Super Smash Bros. series, Shadow appears as an Assist Trophy and uses Chaos Control to slow down time for opponents, but not for the fighter who summoned him.
As an Assist Trophy
Shadow appears as an unlockable Assist Trophy character in Brawl and uses his Chaos Control ability to slow down everyone except the summoner (similar to the effects of the Timer item, though with a shorter duration, and without the risk of it backfiring). Shadow the Hedgehog is unlocked when the player unlocks Sonic as a playable character. He also appears as a regular Trophy and a sticker.
In Brawl, Shadow the Hedgehog is voiced by Jason Griffith (who also voices Sonic) in the English version of the game since his own game and since the anime Sonic X, and Kōji Yusa in the Japanese version.
As an Assist Trophy
Shadow retains his role as an Assist Trophy that slows down time in SSB4. His distortions are more visually apparent in this game, appearing clearly in the foreground. His own visual aesthetics were also altered to be just as bright as in his home series, as well as his mouth's placement being more to the side of his muzzle instead of right below his nose. This time, he is voiced in English by Kirk Thorton, who succeeded Jason Griffith in voicing him in the Sonic series since 2010 with Sonic Free Riders; Kōji Yusa reprises his role in Japanese and just like Sonic, Shadow has gained voices in other languages as well.
As an Assist Trophy
Shadow returns as an Assist Trophy and now holds a green Chaos Emerald. As in Brawl and SSB4, Shadow performs Chaos Control to slow down the opponents of the fighter that summoned him; however, in this game there is a brief second phase that completely stops the opponents. His visual distortion is green and is much more apparent with lightning also striking around him. Shadow also appears as a primary spirit.
Shadow is classed as an Ace, attack-based spirit with 2 support slots. His enhanced version is Super Shadow, a Legend, attack-based spirit with 2 support slots. Super Shadow's effect is Undamaged Attack and Speed.