Giratina vs Sigilyph

[Mithos]

I was playing in a small tourney the other week, and there was a Giratina Ex vs Safeguard Sigilyph in play.

Safeguard:

Prevent all effects of an attack, including damage done to this Pokémon by a Pokémon EX.

Shred 90
This attack's damage isn't affected by any effects on the Defending Pokémon.

My arguement was that the effect of safeguard could only prevent the effects of attacks that apply to Sigilyph when from a pokemon Ex. Furthermore, the effect of Shred would apply to the attack and is not placed upon the defending Sigilyph, so it would not be prevented and there for Shred would rip straight through for knockout.

I have seen another thread where you state that Shred wins out, but is what I have described the correct reasoning? If not could you please explain how/why Shred beats Safeguard?

(For reference the judge of the match [who was using the Sigilyph] ruled that Safeguard won, due to its check being performed before the check for Shred.)

Thank you in advance.
Mithos

(Sorry for posting in the incorrect section initially)

 

[PokePop]

The judge was playing, and he ruled in his own match, giving a ruling that benefited him?
That's cute.
He may want to rethink that process.

Shred says that it ignores effects on the Defending Pokemon.
Safeguard is an effect on the Defending Pokemon.
Therefore, Shred ignores the effect of Safeguard and the damage is done.

Note: If a ruling is given here, a judge should not require further argument.
These are official rulings recognized and authorized by Pokemon.
If a ruling here says something works in a given way, it works in a given way.