Sure does. Goku Black achieves the Super Saiyan form in the manga. This transformation adds a new layer of intensity to the storyline and showcases his growing power.
Sure does. Goku attains the perfected SSJB in the manga during intense battles and as part of his power-up journey. It's a significant moment for his character development.
Definitely not. Fanfiction is a realm of creativity where the boundaries are pushed. There are fanfictions that might introduce new Saiyan characters who are the Legendary Super Saiyan. Also, different interpretations of the existing Saiyan lore can lead to scenarios where Goku isn't the sole Legendary Super Saiyan. For example, some fanfictions might play with the idea that the Legendary Super Saiyan is a title that can be passed on or shared among different Saiyans depending on certain conditions.
Well, if Goku was the legendary Super Saiyan in fanfiction, it could completely change the power dynamics in the Dragon Ball universe. There might be new enemies or allies formed based on this twist.
Well, a common plot in Goku Super Saiyan God crossover fanfiction is the fusion concept. For example, Goku could fuse with a powerful character from another universe. Let's say he fuses with Saitama from One Punch Man. This new fused character would have an insane amount of power. Also, a time - travel plot where Goku goes to a different era in another fictional world. He could end up in the future of the Terminator world and have to battle Skynet's machines using his Super Saiyan God powers.
If Goku were the legendary Super Saiyan in fanfic, it could lead to new story arcs and challenges. Maybe he'd face even more powerful villains or have to deal with the weight of his immense power.