Rakuhouha

"Rakuhouha: Giga attack button on the ground. The ultimate special attack that channels all stored energy into one blast. Use this move selectively as it consumes energy."

- In-game text

Rakuhouha (『落鳳破』), also known as "Falling Phoenix Crush", is the special technique and Giga Attack that Zero learns after defeating Cyber Peacock in Mega Man X4 

Similar Techniques

 * Earth Gaizer from Mega Man X2 and Mega Man Xtreme 2
 * C-Flasher from Mega Man X5
 * Rekkouha from Mega Man X6
 * Bakuenjin from Mega Man X7
 * Tenshouha from Mega Man X8

Counterpart to this Technique

 * Aiming Laser