Wolf Flash (ウルフフラッシュ, Wolf Flash) is Wolf's side special move, and one of Fox's custom side special moves in Smash 4. When it is used, Wolf dashes forward at blinding speed, damaging anyone in his way.
Unlike its counterparts, it sends Wolf upward around 30 degrees, allowing it to act as a recovery from points below the stage. The trail Wolf leaves in his wake does negligible knockback and little damage. However, when there's an enemy at the spot where Wolf stops, the attack is electrified and deals considerable damage while stunning the enemy, launching the foe forward if they're hit in front of Wolf, or meteor smashed if they're hit by Wolf himself.
In Brawl, as with other Star Fox characters' side special moves, Wolf Flash can be cancelled by pressing the button for a special move, which sends Wolf further horizontally without an angle, greatly increases the horizontal reach of the move for recovery, but removing the sweetspot of the attack.
In Ultimate, Wolf Flash can now be angled slightly up or down. It also presents much more pronounced slashing effects upon usage. It still leaves Wolf helpless upon finishing the attack, even though both Fox Illusion and Falco Phantasm haven't caused helplessness since Brawl.
Wolf Flash and ledges
In Brawl, Wolf Flash has characteristics that can cause a number of unusual outcomes when performed near ledges.
Scarring is much harder to perform in Ultimate, as Wolf Flash can no longer hug the ledge as much, which often results in a self destruct.
As a Custom Move for Fox Illusion
Wolf himself does not appear in Smash 4, though the name of his move, Wolf Flash, is used as a customizable option for Fox's Fox Illusion.