Ryu Hayabusa was the fourth secret playable character in Mushroom Kingdom Fusion. He was later dropped due to an excessive number of playable characters.
Ryu first appeared in Ninja Gaiden for the NES. Renowned for its difficulty and story depth, the game saw Ryu travel across the globe to avenge his father's murder and prevent the resurrection of the demon Jaquido. After two more games, Ryu would eventually succeed in sealing away Jaquido for good.
The series was then given a prequel with the XBox version of Ninja Gaiden, in which Ryu set out to recover the Dark Dragon Blade and prevent its power from being misused.
Like Link, Ryu can use his sword to attack enemies. He can also throw ninja stars at enemies and use sub-weapons. These run on an ammo meter and can be refilled from enemy drops.
Ryu's special move is a mid-air dash to gain distance. If it connects with a wall, he can climb it up and down.
Ryu can cling to the undersides of platforms, as well as pull himself up.
Ryu has a 4 HP health meter. He also has slight knockback when struck.