Genki Dama

The Genkidama (元気玉, Genki Dama; Literally meaning "Spirit Ball"; Energy Sphere) is Super Saiyan Goku's down special move in Super Smash Flash 2 and in the anime nd manga Goku's Ultimate technique. SSJ Goku raises his arms and charges up for a short time, and then fires it causing a huge explosion. The charge cannot be saved and SSJ Goku will launch the Spirit Bomb inmediately after finished the charge. Like Fire Mario releasing a fully charge Super Fireball, it drains all of SSJ Goku's power reverting him back to regular Goku, ignoring the time bar.

In the anime and manga, the Spirit Bomb is formed by gathering huge amounts of energy from all chosen surrounding life forms, and conduct that energy into a massive sphere of astounding destructive power. Energy takes the visual form of sparkling, glittering wisps when adding to the mass. The creation of the attack promotes a calm breeze away from the bomb, which turns into a strong continuous gale and expels colorful bands or radiation of Northern Lights-esque aurora. When used it is quite swift, and if the user is not careful of it, the Spirit Bomb could absolutely obliterate a planet.

Essentially, to use the Spirit Bomb, one must have a pure heart(like Goku) so they can manipulate and gather energy, otherwise the move can backfire and possibly hurt or kill the user.