Super Saiyan Blue Son Goku is generally considered to be stronger than Super Saiyan 4 Son Goku. Super Saiyan Blue is the result of Goku mastering the power of Super Saiyan God and combining it with his Super Saiyan form, giving him a significant power boost. Additionally, Super Saiyan Blue allows Goku to access the power of a god, making him even more formidable in battle. While both forms are incredibly powerful, Super Saiyan Blue is typically seen as the stronger transformation. **

Son Goku is a Super Saiyan, not Bardock. Bardock is Goku's father and a powerful Saiyan warrior, but he is not known to have achieved the Super Saiyan transformation. Goku, on the other hand, is the first Saiyan in many generations to achieve the legendary Super Saiyan form, which he first unlocked during his battle with Frieza on Planet Namek. **

The choice between Super Saiyan Blue and Super Saiyan 4 ultimately comes down to personal preference. Super Saiyan Blue is the result of combining Super Saiyan God with the Super Saiyan form, resulting in a powerful transformation with intense blue hair and aura. On the other hand, Super Saiyan 4 is a unique transformation that is achieved through a different method, resulting in a more primal and feral appearance. Both forms have their own strengths and abilities, so it really depends on which transformation resonates more with the individual. **

In Dragonball Xenoverse 2, Goku does not transform into Super Saiyan because the game follows the original Dragon Ball Z storyline where Goku has not yet achieved the Super Saiyan transformation. The game allows players to progress through the story and unlock transformations as they advance, so players have the opportunity to unlock Super Saiyan for Goku and other characters later in the game. This decision was likely made to stay true to the source material and provide a sense of progression and achievement for players as they unlock powerful transformations. **

Yes, in Dragon Ball Super, Son Goku does lose the power of Super Saiyan God. After initially obtaining the power through a ritual, Goku is unable to access it at will. However, he later learns to combine the power of Super Saiyan God with his Super Saiyan form, creating the Super Saiyan Blue transformation. This new form allows him to access the power of Super Saiyan God while in his Super Saiyan state. **

The Super Saiyan God form is generally considered to be stronger than the Super Saiyan 4 form. The Super Saiyan God form is achieved through a ritual and grants the user godly ki, which is said to be more powerful than regular ki. On the other hand, the Super Saiyan 4 form is achieved through a different method and is not considered to be as powerful as the Super Saiyan God form. Additionally, in the Dragon Ball Super series, the Super Saiyan God form has been shown to surpass the power of the Super Saiyan 4 form. **

It is important to note that as an AI, I cannot watch videos. However, in the Dragon Ball series, Son Goku does surpass Super Saiyan 2 and achieves higher forms such as Super Saiyan 3, Super Saiyan God, and even Ultra Instinct. These transformations are part of the canon storyline and are not fake. **

It is important to note that Son Goku's power levels and transformations are fictional and determined by the creators of the Dragon Ball series. Without official confirmation from the creators or the series itself, it is difficult to determine the authenticity of any video claiming Goku has surpassed Super Saiyan 2. Fans should be cautious of unofficial sources and wait for official announcements before drawing conclusions about Goku's power levels. **