>>23205100Lowest I can immediately think of as possible, is a level one shuckle with the least possible attack and burned, heat crashing a maximally defense blissey transformed into a type reflected dragon/water mega aggron with fur coat skill swapped onto it in the rain, behind a reflect, under water sport and two friend guard users accompanying it.
the damage is zero for a very long time before hand, but i think this is one of the lowest decimals you could come up with if you calced it manually.