Meteor Combination

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

Overview
When performed, Goku jumps and uses Instant Transmission, delivering a powerful spin kick upon reappearing. If the hit connects, it deals 13% damage to the opponent and knocks them into a rocky field.

A cinematic plays then plays in which Goku gets down on his hands before rushing forward at the trapped opponent in his Super Saiyan form with an elbow strike. Once the elbow connects, Goku then performs a series of kicks while transforming into his Super Saiyan God, Autonomous Ultra Instinct, and Super Saiyan Blue forms, before ending the barrage with a one-inch punch.

He then uses Instant Transmission to teleport above the victim, reverting back to his base form, before charging and throwing a Genki Dama, a giant, powerful sphere of energy, towards the opponent. Goku then transforms back into Super Saiyan Blue form, makes a salute gesture while saying "See ya!" and uses his force to further push the Genki Dama until it explodes on the opponent and knocks them away, dealing 32% damage and strong knockback. Afterward, the cinematic ends as Goku reverts back to his base form and reappears on the stage with Instant Transmission, ending the move.

Origin
Meteor Combination is a rush attack used several times by Goku in the  franchise. As seen when first used against 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. In SSF2, the move resembles how it appears in Dragon Ball Z: Budokai Tenkaichi 3, though it also includes several milestone techniques of Goku, including his transformations during the barrage of kicks, the Super God Shock Flash in place of the heavy punch, and the Genki Dama in place of the Super Kamehameha. It seems to also draw references to the fight between Goku and Broly in Dragon Ball Super: Broly, in which he briefly enters his ultimate form Autonomous Ultra Instinct while transforming from Super Saiyan God to Super Saiyan Blue.

The Genki Dama, also known as Spirit Bomb, which is used at the end of the move, is regarded as one of the strongest attacks in the Dragon Ball series and the strongest technique in Goku's arsenal, taught to him by the North Kaio, its creator. The Genki Dama is formed by gathering massive amounts of energy from all chosen surrounding life forms, shaping the collected 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 have the potential to obliterate planets and even galaxies. Its use in SSF2 also seems to draw references to the fight between Goku and Majin Buu in Dragon Ball Z, in which Goku uses his Super Saiyan form to push the Genki Dama toward Buu before it eventually explodes, and the fight between Goku and Jiren in Dragon Ball Super, in which Goku powers up through his Super Saiyan Blue form amidst the Genki Dama in order to break Jiren's defenses. The quote "See ya!" is taken from the game Dragon Ball FighterZ and is a reference to the final speech Goku gives to Buu before destroying him.

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.
 * Prior to Beta 1.2.4, Meteor Combination was a Basic Final Smash activated by rushing into opponents.