Fearless Zamasu said:
Gotenks needs to be stronger than Majin Boo who fought Goku in order to gain that confidence lol, but he got his ass kicked which means that Gotenks is a full of shit and shouldn't be taken seriously.
Well the problem with that logic is that every time someone is wrong, then what? We just randomly assign their value? That is not logical. You need to make it like a math equation. There's no reason to drop him down anymore levels than necessary. Same thing for overestimating on our part, we shouldn't radically assume a character is much stronger than suggested. So we set up a bit of a chart here to determine. Asking questions is always best.
1) How strong do the characters say Gotenks is?
A) Piccolo says although he is very strong, he has no chance against Buu.
B) Gotenks thinks he can win, easily.
C) The rest of the crew thinks he can do it, but are banking on Gotenks confidence.
2) What happens in the fight?
We don't know for sure, but Gotenks got his ass kicked, badly. He managed to survive somehow, but he clearly was not right.
3) So how do we evaluate this?
A) Piccolo seems to have the best impression of Gotenks power, he was proven correct. Gotenks is very strong, but nowhere near Buu.
B) Gotenks is an overconfident jackass.
C) Other's confidence seems to rely on Gotenks' confidence. Their ability to sense probably isn't anywhere as good as Piccolo and they are perhaps gullible and naive.
3) So we know where Gotenks power tops out. He is strong enough to get absolutely wrecked by Majin Buu. We know the ceiling, but how do we figure out the floor? Let's assume he's as strong as Majin Vegeta for now.
A) Piccolo is complimentary of Gotenks power, at a time like this, since Goku vs Buu has been established, is it really appropriate for Piccolo to be calling a power of Vegeta or less, very strong? We can't be sure.
B) Gotenks himself is confident. He has to be confident for some reason. Unless he can't sense ki at all. Can't judge movements etc. What is the source of Gotenks confidence? Goten/Trunks have sensed Majin Vegeta, Ssj3 Goku accurately as far as we know. We know Buu is pretty hard to read, but we know Vegeta was getting destroyed by Buu an Goku was fighting very well. For Gotenks to have any realistic confidence, he needs to be somewhere around Goku's level in his mind. He can be overcompensating and not judging Buu correctly, but he is most likely closer to Goku than he is to Vegeta. You can assume that the boys thought Goku was significantly more powerful than Buu as well in this theory based on some parts of the fight they saw.
C) Humans seem to be banking on Gotenks confidence and their ki sensing seems to be a bit out of whack in the saga, but logic dictates that someone who absolutely cannot beat Buu (Vegeta) coming back to life and having supreme confidence, most likely would not result in confidence in his statements. For the humans to think Gotenks has a chance, they need to know that his power is realistically in the ballpark. Vegeta could come back and be extremely confident and the chance they would believe him would be very low. The fact that they talk about Gotenks confidence does seem to suggest they don't think his power is enough, but it's enough for his confidence to sway them. Piccolo is more of a realist and the others are more hopeful, which results in there differing opinions.
Majin Buu >> Gotenks Ceiling >> Gotenks Floor >> Majin Vegeta