The natural assumption would be that rare masterball reverse holos would appear less frequently than commons and uncommons, however I am curious if anyone knows if the distribution frequencies are the same as their non-reverse foil counterparts.
Because masterball holos are guaranteed at one per box, I could imagine a scenario where the sheets that masterball holos are printed on separate sheets that include one per mon which is what made me curious about masterball holo rarities in general.
It would be more based off the fact that other reverse holos in JP sets are also variants of commons, uncommons, rare holos, half art Items and half art Supporters (see Battle Region, Dark Fantasma, Incandescent Arcana). The only key difference is that reverse holos are 1 per pack, and Master Ball reverse holos are 1 per box