Okay, your question is: How do you find out what a pokémon's "0 IVs" are?
I have just taken a look at the guide for myself, and it uses the term "0 IV Stat" to mean what your pokémon's stat would be if it had an IV of 0 in that stat.
Section 5b gives a formula that calculates the 0 IV stat. It's just the basic stat formula with an assumption of an IV of 0:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 5
Where BS = Base Stat, EV = Effort Value, and L = current Level.
Hit points use a slightly different formula:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 10 + L
Where the letters all mean the same thing as last time.
So if you've just hatched a Porygon, it's level 5 and has all of its EVs at zero, then its 0 IV stats will be:
HP:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 10 + L
( ( ( 2 * 65 ) + ( 0 / 4 ) ) * 5 / 100 ) + 10 + 5
( ( 130 + 0 ) * 0.05 ) + 15
( 130 * 0.05 ) + 15
6.5 + 15
21.5
ATK:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 5
( ( ( 2 * 60 ) + ( 0 / 4 ) ) * 5 / 100 ) + 5
( ( 120 + 0 ) * 0.05 ) + 5
( 6 ) + 5
11
DEF:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 5
( ( ( 2 * 70 ) + ( 0 / 4 ) ) * 5 / 100 ) + 5
( ( 140 + 0 ) * 0.05 ) + 5
( 7 ) + 5
12
SAT:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 5
( ( ( 2 * 85 ) + ( 0 / 4 ) ) * 5 / 100 ) + 5
( ( 170 + 0 ) * 0.05 ) + 5
( 8.5 ) + 5
13.5
SDF:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 5
( ( ( 2 * 75 ) + ( 0 / 4 ) ) * 5 / 100 ) + 5
( ( 150 + 0 ) * 0.05 ) + 5
( 7.5 ) + 5
12.5
SPD:
( ( ( 2 * BS ) + ( EV / 4 ) ) * L / 100 ) + 5
( ( ( 2 * 40 ) + ( 0 / 4 ) ) * 5 / 100 ) + 5
( ( 80 + 0 ) * 0.05 ) + 5
( 4 ) + 5
9