When Goku merging with Gohan was the plan, Old Kaioshin talked about the Potara's amazing power being so great that "Gokhan" wouldn't even need to become a Super Saiyan to beat Gotenks Boo (and not because of Ultimate Gohan's power, but because of the Potara's power).PerhapsTheOtherOne wrote:I'm pretty sure it was never established that Vegetto was a stronger fusion than a theoretical Gokhan. That fusion only happened because Gohan had gotten absorbed by Super Piccolo Buu.DBZGTKOSDH wrote:What we know is that base Vegetto is stronger than a base Potara fusion of Goku & Gohan would have been, who would have been stronger than Gotenks Boo, who is stronger than Ultimate Gohan, who is stronger than SS3 Gotenks, who is stronger than SS3 Goku, who is 400 times stronger than base Goku. This is all from the original manga, without taking into account the anime that had shown base Vegetto being close to Gohan Boo's level, because I'm talking about the Super manga, not the Super anime.
Seeing as how Gohan was stronger than Goku by a pretty good margin at that point, I'm inclined to put Vegetto as, at most, "possibly" being equal to Gokhan in base form. What evidence do you have that Vegetto was the stronger fusion?
Chapter: 502 (DBZ 308), P1.3
Context: Goku asks if he should become a Super Saiyan before merging with the Potara, and Elder Kaioshin advices against it
Elder Kaioshin: “If you’re going to become a Super Saiyan, it’s better to do it after merging. But anyway, even without doing that, you’ll probably be plee~~eenty. The Potara’s power is just that amazing!”
After Vegetto appears, Kibitoshin talks about the Potara's amazing power, but Old Kaioshin says that he isn't so powerful just because of the Potara's power (which he hyped before), but also because of Goku & Vegeta being the 2 of the 3 strongest in the universe, and because they are rivals on top of that. He even literally calls him the strongest fusion.
Chapter: 504 (DBZ 310), P9.2-3
Context: as Vegetto beats up on Gohan-absorbed Boo
Kaioshin-Kibito: “H-he’s strong!!! Majin Boo there is helpless!!! To think that merging with the Potara would be this incredible…!!”
Elder Kaioshin: “Idiot, it’s because it was those two that they were able to go so far. Two of the top 3 masters in both the living world and afterlife have merged, after all. What’s more, two rivals have joined together. That’s definitely strongest.”
In the end, Vegetto was forced to use Super Saiyan on Gohan Boo, so base Vegetto is either a little weaker than Gohan Boo, or stronger, but not strong enough to humiliate Boo & force Boo to absorb him. But we know for a fact that he is definitely stronger than Gotenks Boo.
The "rival" part is about the power difference between Goku & Vegeta. The Potara power boost isn't stable, it's not just (A + B)xN, it's dependable on the power difference between the fighters. Kaioshin & Kibito, or Zamasu & SSR Black, in both cases the difference between the pairs is huge, so the result isn't that much stronger that the strongest of the pair (Kibitoshin isn't many times stronger than Kaioshin, and Merged Zamasu isn't many times stronger than SSR Black either). That's why Goku merging with Mr. Satan wouldn't be helpful. Depending on how you view Ultimate, if you view it as a transformation, base Goku is stronger than base Gohan. If not, U. Gohan is much stronger than SS3 Goku, let alone base Goku. But Goku & Vegeta are rivals, equals. So, since they are 2 of the 3 strongest (#1 was Gohan), they make the strongest possible result.