MAGNITUDE
Lv.15 geodude (26-36 att.) VS 13def chansey
turned off the power when dude struggled (forgot to catch it lol)
M4 (1/30 ) damage: 6
M5 (4/30) damage: 16, 18, 18, 16
M6 (7/30) damage: 30, 30, 27, 27, 27, 30, 30 (rock throw did the same)
M7 (12/30) damage: 40, 36, 40, 72 (CH), 37, 42, 36, 39, 39, 40, 40, 42
M8 (2/30) damage: 52, 49,
M9 (2/30) damage: 115 (CH), 61
M10 (2/30) damage: 84, 81
Magnitude***
BP = 10 if R is between 0 and 13 (Magnitude 4),
BP = 30 if R is between 14 and 38 (Magnitude 5),
BP = 50 if R is between 39 and 89 (Magnitude 6),
BP = 70 if R is between 90 and 166 (Magnitude 7),
BP = 90 if R is between 167 and 217 (Magnitude 8),
BP = 110 if R is between 218 and 242 (Magnitude 9), and
BP = 150 if R is between 243 and 255 (Magnitude 10),
where R is a random whole number between 0 and 255 with uniform probability.
so around 5%, 10%, 20%, 30%, 20%, 10%, 5%
I think the base powers correspond with what was assumed, if more tests are needed and someone else wants to test it, those geodudes are in the mt. coronet cave, enter from route 207