Mantis and Crane

The Mantis and Crane styles are a form of assassination arts used by Gen in the Street Fighter series. They are specifically and respectively referred to in the storyline as the Mourning Style (暗殺拳・喪流, Ansatsuken Sō Ryū) and the Hateful Style (暗殺拳・忌流, Ansatsuken Ki Ryū).

Description
The two styles are actually an amalgamation of various Chinese kung-fu styles that Gen trained in during his years as an assassin.

Style Change
In the games, Gen is able to switch between the two styles at any time by pressing all three punch or kick buttons, respectively. Many of Gen's best combos require at least one switch between styled mid-execution.