In the Dragon Ball GT series, Ultra Instinct is not featured because it was introduced in Dragon Ball Super, which is a separate continuity from GT. Additionally, GT was not created by the original creator of Dragon Ball, Akira Toriyama, so there are differences in the story and abilities of the characters. Therefore, Goku does not have Ultra Instinct in GT because it was not a concept that existed in that particular series. **

Merus' Ultra Instinct in Dragon Ball Super is a technique that allows him to react and move instinctively without having to think. This state of being is achieved when the user is able to completely clear their mind of all distractions and let their body move on its own. It is an extremely powerful ability that grants the user incredible speed, reflexes, and combat prowess. Merus demonstrates this ability during his fight against Moro, showcasing his mastery of the technique. **

No, the Kaioken technique cannot be used with Ultra Instinct. Ultra Instinct is a unique and separate transformation that focuses on instinctual fighting and heightened reflexes, while the Kaioken is a technique that multiplies the user's power at the cost of physical strain. Attempting to combine the two could potentially be too taxing on the body and may not be compatible due to their different natures. **

Merus' Ultra Instinct in Dragon Ball Super is a technique that allows him to react and move instinctively without having to think. This state of being is achieved by clearing the mind of all distractions and letting the body move on its own. Merus is able to tap into this power during his battle with Moro, showcasing incredible speed and reflexes. However, using Ultra Instinct puts a great strain on his body due to being an Angel in disguise. **

Ultra Instinct is a powerful transformation in the Dragon Ball series that allows the user to move and react without thinking. It is a state of mind where the body and mind are in perfect harmony, allowing the user to effortlessly dodge and counter attacks. This form is extremely rare and difficult to achieve, as it requires a deep level of mastery over one's own instincts and emotions. In the series, only a few characters have been able to achieve Ultra Instinct, and it is often portrayed as a last resort in desperate situations. **

The second form of Ultra Instinct in Dragon Ball Super is known as "Ultra Instinct Sign" or "Omen." This form is a partial transformation that allows the user to tap into the defensive capabilities of Ultra Instinct without fully mastering the offensive aspects. It is characterized by a silver aura and heightened reflexes, but the user is still required to achieve the complete Ultra Instinct form to fully utilize its power. **

It ultimately depends on personal preference and the context in which the name is being used. If referring to a character from the Dragon Ball series, it would be more appropriate to call him Son Goku Ultra Instinct. On the other hand, if discussing a character from the One Punch Man series, then it would be more fitting to refer to him as One Punch Man. Both names are iconic in their respective series and hold significance to fans of each franchise. **

In Dragon Ball Super, Jiren and Goku engage in an intense battle in their Ultra Instinct forms. Both fighters display incredible speed, power, and agility as they exchange blows. Goku taps into the full potential of Ultra Instinct, showcasing his mastery of the form and pushing Jiren to his limits. The battle reaches a climactic moment as Goku unleashes a powerful Kamehameha wave, but Jiren ultimately overcomes it with his sheer determination and strength. **