Thanks for those calculations, i wouldn't be able to it myself.
I've updated the list of results with those you requested
Snorlax(460kg) with 256 attack using Heavy bomber on all these pokemon having exact 216 def
Giratina-O(750kg): 38-36-36-35-39-38-41-37-39-41 damage
Snorlax(460kg): 36-34-37-38-35-38-35-41-39-38 damage
Torterra(352kg): 40-38-36-36-40 damage
Dragonite(210kg): 60-59-54-53-54 damage
Mewtwo(122kg): 81-75-73-76-77 damage
Venusaur(100kg): 91-96-85-101-87-96-88-89-101-96 damage
Flygon(82kg): 105-102-106-109-108-112-106-113-110-104 damage
Togekiss(38kg): 107-104-114-112-106-107-112-110-102-111-102 damage
Altaria(20kg): 102-104-111-110-106-121-107-108-112-118 damage
Mew(4kg): 114-111-104-113-108 damage
Mesprit(0.3kg):115-112-116-114-117-107-108-119-121-108 damage
Emboar(150kg) with 256 attack using Heavy bomber on all these pokemon having exact 216 def
Torterra(352kg): 35-38-37-36-38-38-35-36-38-34 damage
Mewtwo(122kg): 35-36-36-41-39-35-38-38-37-38 damage
Mesprit(0.3kg): 111-118-117-112-106-106-114-116-112-108 damage
Hariyama(253.8kg) with 256 attack using Heavy bomber on all these pokemon having exact 216 def
Torterra(352kg): 38-37-36-37-34-37-39-34-38-38 damage
Mewtwo(122kg): 58-54-54-58-57-56-59-52-57-56 damage
Mesprit(0.4kg): 119-116-117-107-108-111-114-107-116-117 damage
Code:
[B][U]snorlax[/U][/B] (460kg) heavy bomber:
vs mesprit (0.3kg) BP = 120-127
vs mew (4kg) BP = 120-122
vs altaria (20kg) BP = 120 (Mien. got both max dmg 121 and min dmg 102)
vs togekiss (38kg) BP = 113-120
vs flygon (82kg) BP = 112-120
vs venusaur (100kg) BP = 100 (Mien. got both max dmg 101 and min dmg 85)
vs mewtwo (122kg) BP = 80-86
vs dragonite (210kg) BP = 59-62
vs torterra(352kg) BP = 40-42
vs snorlax (460kg) BP = 40 (Mien. got both max dmg 41 and min dmg 34)
vs giratina-o (750kg) BP = 40-41
[B][U]hariyama[/U][/B] (253.8kg) heavy bomber:
vs mesprit (0.3kg) BP = 118-126
vs mewtwo (122kg) BP = 58-61
vs torterra (352kg) BP = 37-40
[B][U]emboar[/U][/B] (150kg) heavy bomber:
vs mesprit (0.3kg) BP = 117-124
vs mewtwo (122kg) BP = 40-41
vs torterra (352kg) BP = 37-41
OK, according to the above results:
1. heavy bomber´s lowest base power is definitely 40
2. heavy bomber´s highest base power seems to be 120 (try to get that 102 or 104 damage against mesprit with snorlax)
3. heavy bomber has 5 base powers, namely 40, 60, 80, 100 & 120
4. the formula doesn´t depend solely on the target´s weight (doesn´t work as a reverse GK/LK)
don´t shoot me Mien. :)
next tests (just a few hits, 2-3 will be enough against each, maybe even just
one hit against each)
snorlax heavy bomber
vs camerupt (220kg, 1/2 damage)
vs gyarados (235kg, 1/2 damage)
vs hariyama (253.8 kg)
vs rhyperior (282.8kg, lightningrod, 2x damage)
vs hippowdon (300kg)
<- to find where the BP jumps from 40 to 60
vs machamp (130kg)
vs lickilicky (140kg)
vs kingdra (152kg, half damage)
vs milotic (162kg, half damage)
vs regice (175kg, double damage)
vs suicune (187kg, half damage)
vs tyranitar (202kg, double damage)
<- to find where the BP jumps from 60-80
vs salamence (102.6kg)
vs dusknoir (106.6kg)
vs spiritomb (108kg)
vs shelgon (110.5kg) if possible
vs rhyhorn (115kg, 2x dmg) if possible
vs scizor (118kg, 1/2 dmg)
vs exeggutor (120kg)
<- to find where the BP jumps from 80 to 100
vs exploud (84kg)
vs tauros (88.4kg)
vs charizard (90.5kg, 1/2 damage)
vs garchomp (95kg)
<- to find where the BP jumps from 100 to 120
they don´t have to have 216 defense (less is OK, more is not) for a damage calc., just able to survive the hit...if you start with the lightest (test in the order I wrote them, start with garchomp...or with camerupt, doesn´t matter) and
see a jump in damage, you don´t have to test heavy bomber on the following pokémon in that group, skip them and start with the first pokémon in the next group
example: the damage jumps between shelgon and spiritomb, skip dusknoir and sala and continue with tyranitar
good luck