Got bored. I like data and numbers, so have some data and numbers.
Current system, 0-31, ignore 32 for now cause I forgot:
1/4096 = an all 31 IV common "old" shiny.
1/1,000,000 = an all 31 IV common "new" IV shiny
1/244,140,625 = a 25+ IV common non-shiny
1/2,441,406,250,000 = a 25+ IV HR...