Ruling Aegislash EX PHF vs Gengar break through with special energy attached

[ALLABERT]

in this case my aegislash was with 5 damage counters and the other guy tried to attack with creep show with a double colorless energy attached what happen with the mighty shield ability of aegislash.

Gengar – Psychic – 130 HP
Stage 2 – Evolves from Haunter

[P] Unlucky Fog: Your opponent’s Active Pokémon is now Poisoned. Place 1 damage counter on each of your opponent’s Benched Pokémon.

[P][C] Creepshow: If the opponent’s Active Pokémon has 3 or more damage counters on it, that Pokémon is Knocked Out.

Weakness: Darkness ×2
Resistance: Fighting -30
Retreat Cost: 0

 

[PMJ]

We'll need English scans of the cards in question in order to guarantee an accurate ruling.

 

[Mora]

Mighty Shield only prevents damage. As Gengar's attack, Creepshow, doesn't do damage, but instead just Knocks Out your opponent's Active Pokémon, Mighty Shield won't block Creep Show.