My theory about Buus' powers

Jaquan
I guess I'm guilty of overthinking this stuff too, then Just because I know Toriyama didn't think this through doesn't mean that I don't spend time trying to find explanations for it.

whatever
It never made sense to me that Fat Buu splitting and coming back together would somehow make him stronger. My headcanon is pretty similar to yours. Absorbing Dai Kaioshin didn't weaken Buu, but limited his power; Fat Buu actually is as strong as Super Buu, but with such a large chunk of his power locked away (Gohan-style) that he can't beat a SS3. It was only until Super Buu, when the evil side became fully dominant, that all that dormant power could be used.

I think you have a good point in guessing there's a difference between Good Buu and Mr. Buu. To me, this's the best way to explain why Buu became Kid Buu instead of the grey Evil Buu. Good Buu is a manifestation of Buu's goodness (Dai Kaioshin with a little bit of South Kai's) and only appeared once, while Mr. Buu is basically the Dai Kaioshin with a Buu body and is the one at the end of DBZ.

So:
Super Buu minus Good Buu = Evil Grey Buu.
Super Buu minus Mr. Buu = Kid Buu.
Mr. Buu =/= Good Buu, though there's almost no difference, and certainly nothing noticeable.
Mr. Buu < Good Buu.

As for strengths:
Fat Buu's potential = Super Buu's potential.
Mr. Buu < Good Buu < Fat Buu's fighting strength < Kid Buu < Evil Grey Buu < Super Buu.

Yeah, things get crazy with numbers.

I'd say Skinny Buu is stronger than Kid Buu. The Good Buu vs. Evil Buu fight is only about three pages of manga time, and Good Buu doesn't even land a hit. Kid Buu and Fat Buu, however, are duking it out for maybe three chapters, and Mr. Buu gets a few good blows in.

Xeno Black

I disagree with your order. I'll explain: to me it never made sense that absorbing anyone would actually weaken Buu in real output terms. This comes from the notion that this ability is a defense mechanism used by Buu when he's faced by an opponent he can't beat. Thus, for me, it goes like this from weakest to strongest:

1) Mr Buu that appears after Kid Buu spits him
2) Original Kid Buu
4) Fissed Fat Buu (after expelling his evil wrath) = Evil Grey Buu (but given his evil nature, he uses it far better.)
3) Kid Buu with South Kai absorbed
5) Initial Fat Buu (South Kai Absorbed and Fat Kai absorbed) = Super Buu. However, Super Buu has access to the fullpower potential of his 2 absorbees while Initial Fat Buu is too dumb to use them. 3
6) All Super Buu evolutions (I don't think there should be any debate with these ones)

I don't know how to read that "he's getting stronger" sentence. In my headcannon that was just likely a very big slip and shouldn't have been said. It really made no sense that Buff Buu is stronger than Super Buu. Super Buu has two absorbees, Buff Buu only one. By pure logic, Super Buu should be stronger. Not mentioning he actually possesses an intellect, which means even more danger.

I can understand where you coming from that "absorbing anyone would actually weaken Buu in real output terms", but it did occurred to Majin Buu regardless what we think about the logic behind it lol. While the original manga or anime didn't gointo full details on "why" it happened the way it did (besides the inherited goodness of the absorbed, etc), we just have to accept it the way it is.

For example, Super Kid Buu (Kid Buu with Southern Supreme Kai Absorbed) was a true powerhouse that was capable of easily rolling over Eastern Supreme Kai and made Goku and Vegeta sweat bullets upon seeing his returned form. However, when Buu absorbed the Grand Supreme Kai, his soul calmed down so much from his inherited goodness that he became docile (Chapter 314 in the DBZ manga-Viz edition). Thus we can infer that he could no loner access his full potential anymore, which is quite evident since the original Fat Buu was no match for SSJ3 Goku under any circumstances (as explained in the anime when SSJ3 Goku was fighting against Kid Buu.

As for your list, your first and fourth numbers ("Mr Buu that appears after Kid Buu spits him" and "Fissed Fat Buu") are one in the same. Both versions is simply Fat Buu without his evil inhabiting his body anymore, which became either Kid Buu or Evil Buu during such circumstances. Either way, Fat Buu was no match for either combatant, which debunks your first numbers since you believe that "Fissed Fat Buu" is actually stronger than Kid Buu.

As with your Evil Grey Buu being stronger than Kid Buu, I can see your reasoning on why you made that decision. However, it is not correct unfortunately. You see, if the Original Fat Buu is no match for against SSJ3 Goku, then how will his separated parts (Good Fat Buu and Evil Buu) can be stronger than their initial combined form? They can't, which is confirmed in the Japanese sub anime when Piccolo says that Evil Buu "inherited" most of the Fat Buu's power. And if the original Fat Buu was no match for Goku (while Kid Buu can potentially kill Goku in the same form), this will automatically make Evil Buu weaker than Kid Buu.

As for "3" and "5", yes and no. Let me explain.. You see, for the "yes" mindset, original Fat Buu SHOULD be stronger than most of the other forms, but he isn't due to his power being severely restricted (inherited kai goodness or Grand Kai being brain-dead DBM logic). But if those restrictions didn't affect his whole potential, Fat Buu's power would probably be even greater than Super Buu's since Fat Buu has full access to his inherited strength (while canon Super Buu still doesn't have full access to both Kai's strength. I make this point clearer in my blogs, so check them out on the DBM wiki.

As for the "no" mindset, due to the original Fat Buu having his true potential basically sealed away, he became much weaker compared to his previous form (Kid Buu with South Kai Absorbed). Like I said previously, Buff Buu was able to make both Goku and Vegeta pretty nervous, with Goku saying that his ki increased even further compared to Super Buu's own strength (chapter 313 in the DBZ Manga-Viz edition). And if you know Super Buu, both Goku and Vegeta couldn't even defeat his base form in the anime (even if Goku did went SSJ3, it wouldn't be enough), with Goku being afraid to fight him in the manga upon separating from Vegeta. Thus by deductive reasoning, Buff Buu is stronger than regular Super Buu, who is much stronger than original Fat Buu.

But at least we can agree that almost all of Super Buu's absorbed forms is stronger than the rest, though Buff Buu may be somewhat equivalent to Piccolo absorbed since both versions are stronger than regular Super Buu. This could be a debate in it itself lol.

As for your headcannon, I see where you are coming from, but like I said in this post, it simply did not work like that in canon. 

Anyways thanks Khan for this miniature debate, I look forward to hearing your counter responses soon. Also, did you actually got your "3" and "4" numbers mixed up in your list, or was that intentional?

I forget whether I posted something similar to this in the comments section or on here but yeah that's how I see it too. Buu's power is fluctuating wildly because he is no longer in control and he is in a state of change so it's possible his energy shot up to an insane level before finally coming down to a lesser power.