Meteor Combination

Meteor Combination is 's Final Smash in Super Smash Flash 2.

Overview
When performed, Goku gets down on his hands before rushing forward in his Super Saiyan form with his elbow out. Opponents elbowed as he rushes forward are dealt 5% damage and trapped with Goku. Once he stops rushing, Goku then performs a series of kicks with a heavy paralyzing punch at the end to trapped opponents while transforming into his Super Saiyan God and Super Saiyan Blue forms, dealing a total of 28% damage. He then transports a distance away and reverts to his base form as he charges and throws a Genki Dama, a giant and powerful sphere of energy towards the paralyzed opponents, which deals up to 28% damage to opponents and powerfully launches them as it disappears. Goku then transforms into his Super Saiyan Blue form again and uses his force to push the Genki Dama forward until it explodes on the opponents and blow them away. Afterward, he reverts back to his base form again, ending the move.

Origin
Meteor Combination is a rush attack used by Goku in the  franchise. When first used to Piccolo, Goku charges at his opponent and elbows them away, following it up with a barrage of kicks and punches, which ends with a heavy punch to Piccolo's stomach to paralyze him. Afterwards, Goku fires a Super Kamehameha down at him, inflicting a massive amount of damage. This move has been used by Goku a few times and, together with Goku's evolution of power, in SSF2, the move includes many milestone features of Goku, such as his Super Saiyan God form and the Genki Dama.

While the God-ki forms are used commonly by Goku, he rarely uses the Genki Dama, which is regarded as one of the strongest attacks in the series, and is Goku's ultimate move. It was created by the North Kaio and is one of two techniques he taught to Goku when he trained in the other world, the other being Kaiō-ken. The Genki Dama is formed by gathering huge amounts of energy from all chosen surrounding life forms and then conducting that energy into a massive sphere of astounding destructive power. When used, it is quite swift, and if the user is not careful, the Genki Dama could obliterate multiple things, from planets to galaxies. To use the Genki Dama, one must have a pure heart.

This particular version of the Meteor Combination seems to draw references to Dragon Ball Super as Goku powers up in a similar way to how he fought Jiren in the Tournament of Power.

Trivia

 * Prior to Beta 1.2, Goku's Final Smash was instead a Transformation Final Smash called Super Saiyan Goku.
 * Several elements of Meteor Combination seem to be carried over from this Final Smash, including Goku's Super Saiyan Transformation and the Genki Dama he throws at the end of the move.
 * Currently, there is a bug when Goku use the Final Smash in Kaio-ken form in which Goku still gets recoil damage even when he has exit the Kaio-ken form. This will make a drastic disadvantage to Goku since he will be damaged badly after the move.
 * In addition, when Kaio-ken Goku use the Final Smash with an aerial opponent, the opponent will receive no knockback from the Genki Dama.