So if PB will still hit after a successful roll from imperious. Say clix A hits clix B with PB for 4 damage. B rolls a 6, reduces it to 0.

Now you lost me. Why would he take damage if he rolled a successful inperv roll.

You lost me!

Oh snap, I'm good. Thanks guys for correcting my terminology.

But to debate further cause I'm in that kind of mood on this great Xmas day.

Clix A hits clix A for 5 with PB. Clix B has impervious. In turn he rolls a 6. He reduces damage to 0 and clix A is sad he missed.

Ok I get that.

But why can't this also work.

Clix A hits Clix B for 5 with PB. Clix B rolls imperious and scores a 6 on his dice roll. Clix B is happy he ignored all the damage from Clix A's PB.

Reduce= to take away from the sum, which would be 0, missed attack.
Ignore= to refuse the sum, missed the attack.

Or am I just beating a dead horse with this and should just accept defeat and move on?!

You've got to take a closer look at the powers to see how they react.

PENETRATING/PSYCHIC BLAST
Give this character a ranged combat action. Damage from the attack is penetrating damage.

PENETRATING DAMAGE (from the rulebook): Damage dealt that can’t be reduced

So in your first example Clix A hits Clix B with PB. Clix B has Impervious and makes his roll. But since Impervious REDUCES damage and PB damage can't be reduced, Clix B takes the full damage.

When damage is reduced to zero it is not a miss. It is a hit that does zero damage. That's also very important.

IMPERVIOUS
When this character is dealt damage, roll a d6. On a result of 5 or 6, the damage dealt is reduced to 0. On a result of 1–4 , the damage dealt is reduced by 2.

Impervious reduces damage not ignores. The only standard power that ignores damage is Invincible.

INVINCIBLE
Half of damage dealt to this character is ignored

Your definitions of ignore and reduce are not correct either.
When you reduce damage you reduce it, it has no bearing on making the attack hit or miss.
Ignore ignores damage, it also has no bearing on making the attack hit or miss.

If an attack hits and the damage is zero, it is still a hit.

You know, I was so involved with reduce and ignore. I had forgot that little tidbit.

I am defeated. I will word my responses in better fashion.

Thanks all!

Clix A will hit Clix B for 4, B will try to reduce it, penetrating can't be reduced, so that 4 that was dealt can't be reduced to 0 and B will take all 4. The successful roll is irrelevant because it reduces.

No, Clix A will deal 5 to B and B will take 5. His impervious will not reduce the damage at all.