"Waku Waku 7 has an irregular feature set for a fighting game of its time, and includes features common to SNK fighting games (four basic attacks, screens zooming, etc.).
* The game has a roster of nine characters (Two of which were available only in the Versus mode of the console ports). Each has a significantly different playstyle and parodies a well-known character from another game.
* Each character has a powerful special move (Referred to as the Harahara movement, or Harahara motion). They had several factors that made them unique, including:
o They were easy to execute;
o They needed to be charged. (during which the character concentrates, says something, strikes a pose or blows a fanfare)
o They were unblockable and difficult to dodge, but could be interrupted while charging.
o While charging, the game flashes a warning and sounds an alarm.
* Characters could be launched through the screen to hit the other corner, and attacked while on the ground; but could also dodge or attack while getting up.
Source: Wikipedia, "Waku_Waku_7," available under the CC-BY-SA License.