Hell Break
Cell: 6,000,000,000
Freeza: 400,000,000
-100% Form [unseen]: 600,000,000
King Cold: 500,000,000
Recoome: 3,600,000
Burter: 3,800,000
Jeice: 4,000,000
Guldo: 1,000,000
Goku: 40,000,000
Pikkon: 4,500,000,000
~Burning Shoot: 9,000,000,000
(Freeza is shocked by base Goku (here at his Cell Games level) easily taking out the Ginyu Force, commenting that he's improved massively. This implies that, after whatever training they did in Hell, they surpassed Goku's base form from Namek. It's safe to say that the father-son tyrant duo are in a similar boat, having massively improved their powers over the years of training in Hell. Not that it saves them from getting utterly wrecked by Pikkon. Even Cell goes down in three hits when he uses that technique that covers him in a flaming aura. Goku is predictably amazed.)
Afterlife Tournament
Goku: 50,000,000
-Super Saiyan: 2,500,000,000
--Super Kaio-Ken: 5,000,000,000
--Warp Kamehameha: 5,400,000,000
Olibu: 45,000,000
Pikkon: 4,500,000,000
-with weights: 50,000,000
Maraikoh: 47,000,000
Froug: 36,000,000
Torbie: 33,000,000
Arqa: 30,000,000
Gorilla: 22,000,000
Chapchai: 20,000,000
(I'm counting this as part of the Buu arc; all of the levels seem fairly self-explanatory. Weighted Pikkon is a bit stronger than Olibu, and Maraikoh is seemingly a bit stronger than base Goku. Then Pikkon with his weights fights Goku, and they turn out to be pretty even. Everyone else is far below these guys. On the Pikkon vs Goku fight, Pikkon shrugged off immensely powerful attacks with little damage to show for it, indicating a huge degree of superiority compared to Goku. Finally, Goku is noted by Pikkon to be powering up as he fights, so I have a noticeable power difference between Goku at the start and Goku at the end. Though obviously he's not close to his Buu arc counterpart yet.)
25th Budokai
Goku: 80,000,000
-Super Saiyan: 4,000,000,000
Vegeta: 64,000,000
-Super Saiyan: 3,200,000,000
-Super Saiyan 2: 6,400,000,000
Gohan: 60,000,000
-Super Saiyan: 3,000,000,000
-Super Saiyan 2: 6,000,000,000
Piccolo: 2,000,000,000
Trunks: 34,000,000
-Super Saiyan: 1,700,000,000
Goten: 33,000,000
-Super Saiyan: 1,650,000,000
Android 18: 310,000,000
Krillin: 60,000,000
Tenshinhan: 51,000,000
Yamcha: 40,000,000
Chaozu: 17,000,000
Kaioshin: 3,000,000,000
Kibito: 54,000,000
(Goku, Vegeta, and Gohan more or less follow the same path and are as relatively strong as they were in the manga, so I have them at the same levels. Same with a few other characters. A couple characters get downgrades. Everyone else gets an upgrade. For the humans, we have Yamcha sparring with Olibu in the Otherworld filler, as well as Tenshinhan being even with base Trunks in movie 9, putting them and Krillin (who's still stated to be the strongest human in this version) pretty close to the base saiyans. I like to rationalize this as them having trained in the ROSAT.)
(The anime makes Goten and Trunks' power a bit more explicit than it is in the manga: as indicated by their respective performances against Bio-Broly in movie 11, they are worlds above Android 18. However, unlike in the manga, Gohan smacks down Goten easily in their sparring match, and Piccolo is seemingly treated as more powerful than them. So I have them lower here. Speaking of Piccolo, the Cell arc filler depicted him doing VERY well against the Cell Juniors, enough that they needed to double team him to take him down, so he too gets an upgrade, as does Kaioshin for STILL being far above him.)
Babidi's Ship
Dabra: 5,500,000,000
Yakon: 80,000,000
Pui Pui: 180,000
Babidi (barrier+ offensive magic): 2,000,000,000
(No changes for these guys. Just two things to note: one, the anime makes it much more clear that Gohan was a SS2, both when fighting Dabra and when pulling the Z-sword, by giving him lightning in the latter scene and having Goku explicitly state Gohan was fighting at his absolute limit in the former. Two, there's some filler where Babidi kind of annoys Piccolo with some offensive magic goop and makes him struggle to get through his barrier. So there's that.)
Majin Buu's Rampage:
Fat Buu: 8,500,000,000
-Initial: 6,000,000,000
Vegeta [Majin]: 80,000,000
-Super Saiyan 2: 8,000,000,000
Goku: 80,000,000
-Super Saiyan 2: 8,000,000,000
-Super Saiyan 3: 10,000,000,000
Gotenks: 5,000,000,000
-Super Saiyan: 10,000,000,000
(Here's where the first big changes start to manifest. First of all, I have the SS3 multiplier quite low for reasons I will explain later. Secondly, Vegeta is a lot closer to Buu than he would otherwise be, as is Buu to Goku. IMO this is justified as the anime makes Vegeta vs Buu look less one-sided, with Vegeta being very close to him in strength but being beaten mainly because Buu can heal from the many, many attacks he throws (gotta fill out the run time somehow!). Third, per the filler base Gotenks vs Buu fight, Gotenks can actually take some hits from an angry Buu in base and not immediately die, though that's about it.)
Fusion
Gohan: 24,000,000,000
Gotenks: 5,000,000,000
-Super Saiyan: 10,000,000,000
-Super Saiyan 2: 15,000,000,000
Goku: 80,000,000
-Super Saiyan 3: 8,000,000,000
Super Buu: 13,000,000,000
-Piccolo, Goten, and Trunks absorbed: 18,000,000,000
-Gotenks and Piccolo absorbed: 30,000,000,000
-Gohan, Piccolo, Goten, and Trunks absorbed: 42,000,000,000
(Again, three notable deviations here. One, SS3 Gotenks and Buu's fight is a little closer. Two, I've decided to just take the SS Gotenks vs Super Buu fight at face value, i.e. SS Gotenks really can survive blows from Super Buu and hurt him with a headbutt. It's kind of a necessity for the small gaps implied later. Three, Gohan vs Buutenks is changed in the anime, with Gohan actually putting up a decent fight at first. Super Buu vs Gohan is correspondingly made more one-sided, with stuff like Gohan easily countering a heavily charged mouth blast with his bare hands.)
Vegetto vs Buu + Buu's Body
Vegetto: 32,000,000,000
-Super Saiyan: 64,000,000,000
Buuhan: 42,000,000,000
-Initial: 13,000,000,000
-Power Up 1: 24,000,000,000
(Vegetto vs Buu is a somewhat complicated situation in the anime, but here's the long and short of it. After Buuhan trounces Goku and Vegeta (SS2s, judging by the lightning that appears around Vegeta when he enters the fray), they fuse into Vegetto, who then utterly trounces Buu in base, literally letting Buu punch him dozens of times to no effect. Then Buu powers up a lot and unleashes an energy sphere, confident that his new power will overwhelm Vegetto. Nope. Vegetto effortlessly catches and punts it like a football. Buu is briefly shocked, but then smirks and says that Vegetto still isn't as strong as him, and seems to do a power-up in the next episode. Vegetto responds "why don't I show you then?" and goes Super Saiyan, seemingly agreeing with him. After that, Super Vegetto kicks the crap out of Buu, though unlike the manga we actually have several instances of Buu giving Vegetto some trouble, like when he pours himself down Vegetto's throat, or when he starts screaming and putting himself in a barrier, nearly collapsing the universe in the process. So he's stronger, but not dimensions above Buu even as a SS.)
Goku: 80,000,000
-Super Saiyan 2: 8,000,000,000
Vegeta: 80,000,000
-Super Saiyan 2: 8,000,000,000
Toei Team Attack: 16,000,000,000
Super Buu: 13,000,000,000
(As I have noted previously, Goku and Vegeta appear to be SS2s in this filler battle against Buu, as evidenced by the lightning in their auras, as well as the shape of them; the fact that the hair may or may not match isn't really a factor given how inconsistent the hair is in the rest of the anime, particularly the Goku vs Majin Vegeta fight. Individually, Buu easily outclasses them. When it comes down to SS2 Goku vs Buu, he has Goku beat in two hits and a throw and basically toys with him the whole time. When they attack him together, he has more trouble, and they actually do land a couple of hits by taking him off guard, but he can still counter them both. The exception is when they attack at the exact same time, in which case they overwhelm his defense with a combined kick, sending him flying before blowing him to pieces with a combined ki blast, something that along with their subsequent sweep would have killed him if he couldn't regenerate. I liken this to the situation in movie 6, where Cooler is utterly annihilating Goku and Vegeta but goes down in one hit when they combine their attacks.)
(It should be noted that Buu was smiling as this was happening though; while he appeared to be using full strength, presumably if this fight took place under more serious circumstances, he'd at least be attacking aggressively instead of giving his enemy the initiative every single time, which would largely nullify their chances even if Goku was a SS3, hence why he outright says they have no chance against Buu if they go outside.)
Pure Buu's Rampage
South Kaioshin: 8,000,000,000
Grand Kaioshin: 5,000,000,000
North Kaioshin: 4,000,000,000
West Kaioshin: 3,500,000,000
East Kaioshin: 3,000,000,000
Pure Buu: 10,000,000,000
-SK absorbed: 18,000,000,000
(These levels all seem self-explanatory from this flashback fight. The North and West Kaioshin both go down in one hit; I only have the former stronger because he was killed after the latter. The Grand Kaioshin and East Kaioshin are just as helpless against Buu, though the former at least has a powerful technique that cuts Buu's body (not that it does anything). The MVP here is South Kaioshin, who puts up a decent fight against Buu for a while, but is defeated relatively quickly as well, and absorbed. Note that Super Buu's power is equivalent to (SK + Pure Buu) - GK, as the Grand Kaioshin is still holding back his power in exchange for giving him sapience and additional intelligence. Ain't I clever?)
Final Battle
Pure Buu: 10,000,000,000
-Warming Up: 7,500,000,000
Goku: 80,000,000
-Super Saiyan 2: 8,000,000,000
-Super Saiyan 3: 10,000,000,000
Mister Buu: 8,500,000,000
Vegeta: 80,000,000
-Super Saiyan 2: 8,000,000,000
Genki-Dama:
-+Gohan and others' ki: 12,000,000,000
-+Earthlings' genki: 22,000,000,000
(Here's where I justify the biggest difference between my manga and anime lists: the SS3 multiplier being x1.25 SS2 instead of x4 SS2. Simply put, it all has to do with Vegeta. In the anime, we clearly have Vegeta putting up a decent fight against Pure Majin Buu, landing several good hits and getting up after a barrage of blows that Buu expected to kill him. It gets to the point where scenes from the manga are actually slightly changed to make it clear that Vegeta is near his level; for example, instead of being slightly shocked and then immediately smiling after Vegeta blows off his legs, Buu looks scared at first and then outright angry, after which Vegeta blasts him into goo. Another example is Buu's reaction to Vegeta getting up after his barrage; in the manga he laughs while Vegeta crawls out of the crater, making it apparent he's screwing around. In the anime, Buu instead takes a step back in shock and fear, the implication being that he genuinely was trying and expected those blows to kill Vegeta. This extends beyond this fight; there's also the above filler battle in Buu's body, as well as SS2 Vegeta managing to hurt Janemba with a double-handed ki blast in movie 13 and dodge a couple of strikes from him.)
(On a more minor note, it's implied in the manga that Buu when he first showed up was in some sort of suppressed initial level below SS2 Vegeta, based on Vegeta at first being confident about his OWN chances against Buu, and then later commenting that Buu is a lot more powerful than he imagined he'd be. This is explicitly the case in the anime where he actually fights SS2 Goku in that state and is at a disadvantage.)
Mr. Satan: Maximum
(Holding back, as usual, to make things interesting.)