Dragon Ball Z: Majin Buu Arc HYPOTHETICAL Power Levels List (Age 774)

5 Million years before present:

• Kid Buu (pure Majin form): 4,500,000,000
• Bibidi: 2,000,000
• Alpha-Seijin: 10,000 each
• North Supreme Kai: 1,500,000,000
• West Supreme Kai: 1,000,000,000
• South Supreme Kai: 2,000,000,000
• East Supreme Kai: 600,000,000
• Grand Supreme Kai: 5,000,000,000
• Kid Buu in his huge Majin form (buffed): 5,500,000,000
• Fat Majin Buu: 1,800,000,000

28th World Tournament Saga:

• Goku: 20,000,000
• Vegeta: 25,000,000
• Gohan: 12,000,000
• Goten: 350,000
• Trunks: 380,000
• Piccolo: 600,000,000
• Krillin: 275,000,000
• Yamacha: 6,000,000
• Chi-Chi:
• Android 18: 450,000,000
• Mr. Satan: 100
• Jewell: 50
• Killa: 53
• Mighty Mask (original human): 32
• Pintar: 86
• Yamu: 10,000,000
• Spopovitch: 10,000,000
• Kibito: 540,000,000
• Eastern Supreme Kai ("Shin"): 800,000,000
• Super Sayian Gohan: 600,000,000
• Super Sayian 2 Gohan: 1,2000,000,000
• Gohan while being held by the Supreme Kai: 650,000,000
• Gohan after Yamu & Spopovitch drained his energy: 10
• Gohan after a Senzu Bean:13,000,000
• Videl: 200
• Spopovitch (heavily holds back): 500
• Videl (dying): 0.3
• Videl after Senzu Bean: 210
• Mighty Mask (Trunks & Goten): 730,000
• Android 18 (supressed): 800,000
• Mighty Mask (kids as SSJ): 36,500,000
• Android 18 (fights more seriously): 45,000,000

Battles with Babidi's Majins/Forces in Babidi's Spaceship:

• Babidi: 1,000,000
• Dabura: 900,000,000
• Spopovitch overloaded with power by Babidi: steep rise to 100,000,000 then to 0 when explodes
• Yamu running off scared: 7,000,000
• Pui-Pui Nice Shot: 23,000,000
• Dabura executes Kibito: 1,000,000,000
• Kaioshin scared: 500,000,000
• Kibito shocked: 350,000,000 to 0 when murdered by Dabura in an instant
• Krillin turned to stone by Dabura's spit: all the way to 0.000000001 {still alive}
• Piccolo turned to stone by Dabura's spit: all the way to 0.000000001 {still alive}
• Vegeta: 25,000,000
• Pui-Pui: 21,000,000 {his agility rises while in his home planet Zoon, yet his PL=same}
• Vegeta's blast to Pui-Pui's chest: 30,000,000 ("Double Galic Cannon")
• Son Goku; 20,000,000
• Common Majin Soldier: 150,000
• Yakon: 400,000,000
• Super Saiyan Goku: 1,000,000,000
• Yakon after eating some of Goku's SSJ energy: 500,000,000
• SSJ Grade 2 Goku: 1,100,000,000
• Yakon overloaded with SSJ Goku's Ki: 650,000,000
• Dabura (fracture of power): 15,000,000
• Gohan: 13,000,000
• SSJ Gohan: 650,000,000
• Dabura's 50%: 575,000,000
• Dabura's true power: 1,150,000,000
• SSJ 2 Gohan: 1,300,000,000

 Majin Buu Saga

• Majin Buu (evil contained, yet calm): 1,000,000,000
• Majin Buu (evil contained, fights seriously): 1,500,000,000
• Dabura injured: 950,000,000
• Babidi: 1,000,000 (said by Goku later to be a "1,000 times weaker than the fat Majin Buu")
• Gohan (tired from his battle with Dabura): 12,000,000
• Super Sayian Gohan: 600,000,000
• Super Sayian 2 Gohan: 1,200,000,000
• SSJ 2 Gohan's Kamehameha wave: 1,300,000,000
• Supreme Kai's attack on Buu: 880,000,000
• Supreme Kai injured by Buu: 350,000,000 to 1.5 when unconscious)
• Dabura turned into cookie: ~1 (barely alive, can't function)
• Gohan (passed out): ~1 (ki indetectable, thus believed to be dead)
• Majin Vegeta: 1,400,000,000
• Super Sayian 2 Goku: 1,400,000,000
• Majin Vegeta injured post fighting: 1,095,000,000
• SSJ 2 Goku injured post fighting: 995,000,000
• Goku after Vegeta hitted him: ~2
• Majin Vegeta after Senzu Bean: 1,450,000,000
• Krillin: 275,000,000
• Piccolo: 600,000,000
• Trunks: 380,000
• Super Sayian Trunks: 19,000,000
• Goten: 350,000
• Super Sayian Goten: 17,500,000
• Trunks after Vegeta hitted him: ~1
• Goten after Vegeta hitted him: ~0.8
• Majin Buu fighting Majin Vegeta: 1,700,000,000 -> 1,850,000,000
• Majin Vegeta's all out explosion: 1,800,000,000
• Babidi's cutted to pieces: 1,050
• Babidi healed by Buu: 1,400,000
• Goku (back to concious): 15,000,000
• Majin Buu (empowered by eating many Earthlings): 2,000,000,000
• Goku as Super Sayian: 725,000,000
• Goku as Super Sayian 2: 1,450,000,000
• Yamacha: 6,000,000 (slacked off since the Cell Games, 7 years prior)
• Master Roshi: 150 (I assume he did got a little stronger over the years from his 139 rate)
• Tien: 250,000,000
• Chiaotzu: 5,000,000
• Videl: 120
• Goku as Super Sayian 3 (not fighting seriously as later revealed): 2,500,000,000
• Gotenks (skinny): 3,000,000
• Gotenks (fat): 9,000,000
• Gotenks (Base Form): 18,000,000
• Majin Buu (calm & heavily holds back against Gotenks): 38,000,000

Fusion Saga:

• Majin Buu: 2,000,000,000 (before splitting into 2 Buus)
• Mr. Satan: 87
• Bee: 0.5
• Van Zant: 20
• Smitty: 4
• Fat/Good Buu: 1,000,000,000
• Thin/Evil Buu: 1,100,000,000
• Master Roshi: 150 
• Yamcha: 6,000,000 
• Ox King: 90
• Chi Chi: 75
• Bulma: 15
• Krillin: 275,000,000
• Android #18: 450,000,000
• Dende: 10,000
• Mr. Popo: 100,000
• Super Buu (Base Form): 2,100,000,000
• Super Buu's Humans Extinction Attack: 2,400,000,000
• Tien: 250,000,000
• Chiaotzu: 5,000,000

Gotenks vs. Super Buu:

• Piccolo: 600,000,000
• Super Buu in the Hyperbolic Time Chamber: 2.360.000.000
• Trunks (post Room of Spirit & Time training): 450,000 (based on the fact they were only on 1st Form Frieza tier 2 years later in the 2008 OVA)
• Goten (post training): 400,000
• Gotenks (Base Form post training): 25,000,000
• Gotenks (Super Sayian): 1,250,000,000
• Gotenks' Super Ghost Kamikaze attack: 2,050,000,000
• Piccolo's Special Beam Cannon to destroy the door: 745,000,000
• Super Buu's dimensional opening scream: 2,600,000,000 {a burst of a moment}
• Gotenks' all out scream: 1,700,000,000
• Piccolo's all out scream: 750,000,000
• Gotenks (Super Saiyan 3): 2,150,000,000
• Gotenks' Super Ghost Kamikaze attack: 2,450,000,000
• Super Buu (holding his true power waiting for Gohan): 2,300,000,000
• Super Buu sealed inside Gotenks' Volleyball attack: 2,000,000,000
• Gohan (base form after Kibito healed him): 15,000,000
• SSJ Gohan trying to pull out the Z-Sword: 750,000,000
• SSJ 2 Gohan trying to pull out the Z-Sword: 1,500,000,000
• SSJ 2 Gohan training with the Z-Sword: 1,520,000,000
• Kibito: 540,000,000
• Kaioshin: 800,000,000
• Old Kaioshin: 13,000,000
• Gohan (base form before the Old Kaioshin's potential unlockment): 17,000,000
• Ultimate/Mystic Gohan: 2,500,000,000

Ultimate/Mystic Gohan vs. Super Buu:

• Mystic Gohan battle ready: 2,780,000,000
• Super Buu battle ready: 2,650,000,000
• Super Buu's mouth blast: 2,700,000,000
• Super Buu self-injured after Gohan blocked his mouth blast: 2,500,000,000
• Super Buu self-injured while Gohan beats him up: 2,100,000,000
• Super Buu's true power: 2,800,000,000 powers up to 2,999,000,000 at max
• Mystic Gohan's full power: 3,100,000,000
• Kibito-Kai (demonstration of Potara fusion): 1,340,000,000
• Super Buu (Gotenks & Piccolo absorbed): 4,700,000,000
• Mystic Gohan heavily injured: 1,800,000,000
• Tien's Tri-Beam to save Gohan: 1,500,000,000
• Ultimate Gohan after Dende heals him: 2,800,000,000
• Goku (revived using a Destrecto Disc): 300,000,000
• Tien (dying from Super Buu's legs kick): ~3
• Tien after Dende heals him: 250,000,000
• Super Buu (Piccolo, Goten &  Trunks absorbed): 2,700,000,000

Vegetto vs. Super Buu:

• Super Buu (Gohan, Piccolo, Goten & Trunks absorbed): 5,200,000,000
• Goku (base): 40,000,000
• Vegeta (base): 35,000,000
• Super Sayian Goku: 2,000,000,000
• Super Sayian Vegeta: 1,750,000,000
• Vegetto: 6,500,000,000
• Super Buu (Buuhan)'s muscular form: 5,750,000,000
• Super Buu's energy orb: 5,900,000,000
• Vegetto as a Super Sayian: 300,000,000,000
• Super Vegetto while Super Buu invades his body (buffed): 305,700,000,000
• Super Buu's Super Ghost Kamikaze Attack 1st try: 10,000,000,000
• Super Buu's Super Ghost Kamikaze Attack 2nd try (with Kamehameha & Galic Gun): 100,000,000,000
• Vegetto as a candy: 60,000,000,000
• Super Buu with Super Vegetto absorbed (splits into 2 right after): 75,200,000,000 goes down to 17,200,000,000 due to defusing & will go down drastically further when all captives are released
• Worms inside Buu: 1,000,000
• Worms' father: 10,000,000
• Super Buu's mental incarnation: 7,500,000,000

 Kid Buu Saga

• Super Buu transforms into Kid Buu (after all absrobed were released): 5,300,000,000
• Kid Buu: 5,500,000,000
• Kid Buu's destroying the Earth: 5,800,000,000
• Krillin (on the Grand Kai's planet): 300,000,000
• Yamcha (on the Grand Kai's planet): 240,000,000
• Olibu: 200,000,000
• Pikkon: 280,000,000
• Super Sayian 2 Goku (on the Kaioshin's planet): 1,750,000,000
• Super Sayian 2 Vegeta (on the Kaioshin's planet): 1,650,000,000
• Super Sayian 2 Goku (powered up to max on the Kaioshin's planet): 3,000,000,000
• Super Sayian 2 Vegeta (powering up to max on the Kaioshin's planet): 2,750,000,000
• Super Sayian 3 Goku: 5,000,000,000
• Dabura in heaven: 900,000,000 (said to be on Super Perfect Cell's tier)
• Frieza in hell: 180,000,000
• King Cold in hell: 140,000,000
• Cell in hell: 980,000,000
• Babidi in hell: 1,000,000
• Jeice in hell: 500,000
• Burter in hell: 450,000
• Recoome in hell: 400,000
• Guldo in hell: 130,000
• Dr. Gero/Android 20 in hell: 250,000,000
• Appule in hell: 17,000
• Goz & Mez: 1,300 each
• Moori (Namek's Grand Elder): 8,500
• Namekians: 1,000 - 3,000 
• Android 17: 430,000,000
• Common Humans: 3-10
• Android 8: 186
• Snow (adult): 4
• Bora (old): 45
• Upa (adult - 44 years old): 53
• Launch: 28
• Yajirobe (old & off-shape): 700
• Korin: 1,000
• Nam (old): 90
• Bandages the Mummy: 93
• Devilman: 123
• Sharpner: 15
• Erasa: 3
• King Fury: 5
• King Fury's guards: 27 each
• Goku while using Genki Dama after his power level dropped from it's peak: 5,250,000,000 -> 4,950,000,000
• Kid Buu struggles with the Genki Dama while Goku is "weak": 5,700,000,000 -> 5,300,000,000 (wore himself out)
• Goku's Final Spirit Bomb (powers restored to max): 5,400,000,000
• SSJ Goku's Final Spirit Bomb (powers restored to max): 6,000,000,000
• Kid Buu struggles with the Genki Dama: 5,000,000,000 and drops fast all the way to 0 when defeated