Super Kaio-ken (超界王拳 Sūpā Kaiōken, lit. "Super World King Fist" or "Super Fist of the King of the Worlds"), also called Super Saiyan Kaio-ken, is a combination of the Super Saiyan transformation and the Kaio-ken technique.
Goku uses this technique while fighting in the Other World Tournament against Pikkon. By using the power of Kaio-ken while in his Super Saiyan form, Goku gains a massive power increase, which is statistically equivalent to that of a Super Saiyan 2, by taking the 2x multiplier of these forms into consideration. Goku is seen punching Pikkon towards an asteroid orbiting the Other World Stadium, after which he reverts to his Super Saiyan form.
- Super Saiyan Blue Kaio-ken - Kaio-ken can be used alongside the Super Saiyan Blue form, with the anime showing the multiplier going up to x20.
- Super Saiyan 4 Kaio-ken - In some video games the Super Saiyan 4 form has been combined with Kaio-ken as a power up.
In the Dragon Ball Z arcade game by Banpresto, Goku has the Kaio-ken as one of his special moves, and he is able to use it even in his Super Saiyan form. Similarly, in Super Dragon Ball Z, Goku is able to use Super Kaio-ken by transforming into a Super Saiyan and then using Kaio-ken.
In the Dragon Ball Z Collectible Card Game, Goku can use this Kaio-ken in combination with any of his appearing Super Saiyan forms: Super Saiyan, Super Saiyan Second Grade, Super Saiyan 2, Super Saiyan 3, as well as the Golden Great Ape form.
In Jump Super Stars, Goku can oddly use this in his Battle Koma 5 as his Special B/Up Special, being able to use it as a charged attack which increases the number of physical blows he will perform in the brief combo for that one attack. It is used in the same fashion as the Super Kaio-ken (due to BK5 Goku being in Super Saiyan mode by default), only Goku simply has the red aura's outline with no actual change to his colors inside of said aura. It has been somewhat rectified in Jump Ultimate Stars, with Goku having his Battle Koma 5 being in his normal form instead.
In Dragon Ball Xenoverse 2, while it is impossible to use the Kaio-ken and Super Saiyan Awoken Skills together, it is possible to use Kaio-ken-based Super and Ultimate Skills such as Kaioken Assault, Kaioken Kamehameha, and its x4 and x20 Ultimate Skill variations along with any of the Super Saiyan forms available to the Saiyan Future Warrior (including Super Saiyan 2 and Super Saiyan 3). After the 1.09.00 Update, Goku can be customized to be able to use these techniques while in his Super Saiyan forms (including Super Saiyan 2 and Super Saiyan 3) through Partner Customization. While the Kaio-ken aura is visible when these attacks are used, it does not grant any increase, thus the Future Warrior or custom Goku only visually appears to be using the Super Kaio-ken. It should be noted it is also possible to use these skills with other Awoken Skill transformations such as Potential Unleashed or the Frieza Race's Turn Golden form, as well as the Kaio-ken Awoken Skill itself. After the 1.09.00 Update, the Future Warrior can also utilize these techniques with their Super Saiyan God Super Saiyan Awoken Skill which makes them visually appear to be using Super Saiyan Blue Kaio-ken.
The technique made its official video game debut in Dragon Ball Z: Dokkan Battle where Goku is a playable character in this form. The form's Super Attack, Super Kaio-ken Kamehameha, recreates the punch into the moon and (attempted) follow-up Kamehameha that Goku performed on Pikkon. Interestingly, Goku remains in his Super Kaio-ken state when performing the Kamehameha after the punch. In the anime, Goku's Super Kaio-ken ended after punching Pikkon. It should be noted this is one of a number of characters who are not available on the Japanese version as these were made for the Global version to replace the mission Dragon Ball Heroes characters. In June 2018, it was later made available to the Japanese version.
Vegito: Xeno as Super Saiyan can use the Kaio-ken technique in Super Dragon Ball Heroes.
- Vegito: Xeno's variation of the Super Kaio-ken has a double aura, making it similar to the Super Saiyan Blue: Kaio-ken.
- It was mentioned by Old Kai in Dragon Ball Super that using Kaio-ken alongside Super Saiyan is almost impossible or rather lethal because the intense emotional turmoil caused by the Super Saiyan transformation would not allow precise ki control to survive the technique.
- Presumably, Goku was only able to use it during the Other World Tournament due to him being dead at the time he used it and would explain why he never attempted the Super Kaio-ken while alive due to the risk.
- This is also why Super Saiyan Blue, once mastered, could be combined with Kaio-ken, due to the form's perfect innate ki control. However, without sufficient training doing so still poses immense risks to the user and the after effects are quite devastating.
- However, Vegito: Xeno is able to utilize it while alive in Super Dragon Ball Heroes.
- ↑ Dragon Ball Xenoverse 2, 2016
- ↑ Dragon Ball Heroes, 2017
- ↑ Super Dragon Ball Heroes: World Mission
- ↑ 4.0 4.1 Dragon Ball Xenoverse 2, 1.09.00 Update DLC