IV/Nature legality

[some]

Here:

http://www.smogon.com/dp/pokemon/raikou

Near bottom there's a section on legal IVs for hidden power for each nature.

Where does the restriction come from? Because of so, I have to re-edit all my pokemons that have near-perfect IVs matched to correct hidden power type.

[NulMyre]

The restrictions come from the PID/IV combos, via RNG.

Call 1 and 2 go into the PID, then 3 and 4 go into the IVs, ignoring the highest bit.

Given that the RNG formula is linear, there is few combos, but ignoring the highest bit means that there is always 2 PIDs minimum to each IV set.

Remember, PIDs dictate nature, gender, half of shininess, and class for double-ability Pokemon.

[some]

Is there a chart where I can calculate this? Does the legality checker check for this? Is there a program where I can input desired nature and get max IVs possible?

Thanks.

[angelcat621]

I use this chart for max hidden powers:

http://www.smogon.com/forums/showthread.php?t=13601

[some]

No offence, but such charts can be found easily.

What you point still doesn't explain what is said my link.

[NulMyre]

Given that the restriction is directly a PID/IV combo issue, the legality checker does check for this.

I was considering writing up a PID/IV seeker program, due to a couple of things the current one has (speed issues being #1), I aim to have a faster and more flexible program.

In the meantime, just post up nature/HP type combos and I can put up the max possible IVs with the correct PIDs.