Hadoken

The Hadoken (波動拳) is a move from Capcom's Street Fighter series of fighting games that was included in as a secret power-up obtained from a Light Capsule in Mega Man X, Maverick Hunter X, Mega Man Xtreme and Mega Man Xtreme 2, and is executed in the same way, inputting the combination ↓↘→+ATTACK while X's health gauge is full and he is on the ground to unleash a powerful energy ball. It causes 32 damage, being able to destroy most bosses and enemies in a single hit.

In Mega Man X4 Hadoken is one of Magma Dragoon's attacks. In Mega Man X: Command Mission the boss Ninetails uses the Annihilator Hadoken (滅殺波動拳 Messatsu Hadoken). In Project X Zone X uses a powerful Hadoken alongside Zero's Genmurei.

Street Fighter X Mega Man
Hadoken is Ryu's special weapon from Street Fighter X Mega Man. When used, Mega Man will release a small and slow Hadoken, and can be charged to shoot a quick yellow Hadoken. The Hadoken is the ideal weapon against Chun-Li, M. Bison, and Akuma; though the charged Hadoken inflicts extra damage to Akuma and M. Bison, Chun-Li only incurs regular damage.