Hadoken

The Hadouken (波動拳, hadoken, "surge fist", a Japanese neologism, literally "wave motion fist") is a special attack that originated in the classic Capcom fighting video game series Street Fighter. The practitioner thrusts his or her palms forward, sending a surge of spirit energy (or ki) flying towards the opponent. It is normally performed by moving the joystick or D-pad a quarter circle forward towards the opponent from the down position, then pressing a punch button; which is usually written in manuals and guides as "↓↘→P" (assuming a right-facing character). It is referred to colloquially as the "Fireball", even though most versions of the Hadouken do not involve the use of fire. Most versions can be dogded by jumping over them.

Different Types of Hadouken
Hadouken (波動拳, hadoken, "Surge Fist") – The surge fist in which a character's willpower is utilized to focus ki into and through the palms. As the palms are thrust outwards towards the target, a surging shock-wave is expelled that results in a punching force traveling through the air. The user will usually be immobilized for a short time after performing this move, leaving them vulnerable to counterattack.

Shakunetsu Hadouken (灼熱波動拳, shakunetsu hadoken, "Scorching Surge Fist") – A Hadouken which is imbued with the power of fire. Executed by Akuma, anyone touching this Hadouken risks immolation and will be knocked down.

Shinkuu Hadouken (真空波動拳, shinkū hadoken, "Vacuum Surge Fist") – A Super charge of the Hadouken; when executed, the Shinkuu Hadouken can hit the opponent multiple times and destroy other projectiles launched by the opponent. It is much more powerful than a normal Hadouken.

Gou Hadouken (豪波動拳, go hadoken, "Great Surge Fist") – It is more powerful than a normal hadouken. In very close quarters combat, the damage is more.

Zankuu Hadouken (斬空波動拳, zanku hadoken, "Air Slashing Surge Fist") – This is an air fireball used by Akuma, which travels diagonally down and towards the opponent. Some versions of the Akuma character can launch two Zankuu Hadouken at the same time, with both traveling at different angles towards the ground.

Tenma Gou Zankuu (天魔豪斬空, tenma go zanku, "Heavenly Demonic Great Air Slash") – A more powerful version of the zankuu hadouken. Akuma uses this Super Combo to throw a barrage of mid-air projectiles at his opponent, crushing them.

Messatsu Gou Hadou (滅殺豪波動, messatsu go hadou, "Destructive Strong Surge Fist" - A more powerful version of the Shinkuu Hadouken.

Denjin Hadouken (雷刃波動拳, denjin hadoken, "Thunder Blade Surge Fist") – A chargeable Hadouken that electrifies the defender, stunning them momentarily.

Metsu Hadouken (滅波動拳, metsu hadouken, "Destructive Surge Fist") - By using the energy of the dark hadou to ultra charge up a hadouken and with the intention to kill. It is an incredibly powerful Hadouken.

Users
Ryu

Ryu focuses more on the Hadou principle of the fighting style, which makes him being very skilled with his usage of ki. Most of Ryu's finishing attacks are the Hadouken which make him generally a better user then Ken. As time progressed, Ryu's version was the most outstanding of its practitioners, with superior speed and recovery time compared to his rivals.

-Hadouken

-Shakunetsu Hadouken

-Shinkuu Hadouken

-Denjin Hadouken

-Metsu Hadouken

Ken Masters

Ken is also a student of Gouken alongside his partner/ best friend Ryu so he also has the hadouken but due to him prefering style he prefers using other moves as his finishing blow.

-Hadouken

Akuma

All of Akuma's hadouken are evil and the ki is purple in colour unless otherwise.

-Hadouken

-Gou Hadouken

-Shakunetsu Hadouken

-Zankuu Hadouken

-Tenma Gou Zankuu

Sakura Kasugano

Sakura's hadouken is imperfect since she is not trained in the Hadou-style. She learned by imitating Ryu.

-Hadouken

Sean Matsuda

Having not trained enough, his hadouken is weak and has a slow charge up.

-Hadou Burst/Blast