Bijū Dama

The Bijūdama (尾獣玉, Tailed Beast Ball Viz serialization: Biju Bomb) is Kyūbi Naruto's side special move in Super Smash Flash 2.

Kyūbi Naruto transforms into his Four-Tailed Form, creates a dark sphere out of Chakra, swallows it, and fires it in the shape of a beam through his mouth that deals 35% damage but minimal knockback. The beam has transcendent priority, but it can be reflected with 's Proto Shield, 's Cape and 's Reflector.

Origin
Taught to Naruto by Killer B, the Bijūdama is the ultimate attack of a Tailed Beast, thus the ultimate attack of its Jinchūriki. To form the attack, the Jinchūriki must gather both Positive Black Chakra (+の黒チャクラ, Purasu no Kuro Chakura), and Negative White Chakra (−の白チャクラ, Mainasu no Shiro Chakura) from its Tailed Beast, shape it into a sphere, and then compress it inside their mouth. The black and white chakra needs to be balanced at an 8:2 ratio respectively or it will backfire. The ball can be fired differently, either in sphere form, which can be detonated for a wave explosion or launched to form a dome-shaped blast which flattens and erases everything around it, or as a concentrated beam of energy which gives it explosive penetrative power.