Meteor Combination

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

Overview
When performed, Goku uses Instant Transmission towards a nearby foe and delivers 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 his elbow out. Once he stops rushing, Goku then performs a series of kicks with a heavy punch at the end while transforming into his Super Saiyan God, Autonomous Ultra Instinct, and Super Saiyan Blue forms. He then uses Instant Transmission to teleport above, reverting back to his base form, and charges and throws a Genki Dama, a giant and 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 to the opponent. Afterward, the cinematic ends as Goku reverts back to his base form again and reappears on the stage with Instant Transmission, ending the move.

If there are no opponents nearby when performing the initial kick, Goku will simply reappear in the same position he used Instant Transmission in, ending the move. The move may also end prematurely if Goku fails to trap any opponents with his kick.

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, the Super God Shock Flash, and the Genki Dama. 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, which is used at the end of the move in SSF2 in place of the Super Kamehameha, is regarded as one of the strongest attacks in the series and is the strongest technique in Goku's arsenal. 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 it, one must have a pure heart. Its use in SSF2 also seems to draw references to the fight between Goku and Jiren in the Tournament of Power in Dragon Ball Super, in which Goku powers up through his Super Saiyan Blue amidst the Genki Dama in order to break Jiren's defenses. It also references his fight with Majin Buu in Dragon Ball Z, in which he assumes his Super Saiyan form while pushing the Genki Dama toward Buu before it eventually explodes, destroying Buu. The quote "See ya!" is taken from the game Dragon Ball FighterZ.

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.