>>16403447Mold Breaker (and Teravolt/Turboblaze) don't negate opposing abilities, they ONLY negate abilities which have the potential to change an attack's capacity to do damage.
Levitate, for example, or Battle Armor, Marvel Scale, or Filter, or even stat-altering stuff like Oblivious/Own Tempo, or stuff that only marginally alters damage like Sturdy, or stuff that might actually make the move do MORE damage (mold breaker ignores the damage boosting of fire type moves when it negates Dry Skin).
It doesn't supress any other abilities; it won't stop your opponent from Intimidating you, or make Poison Heal stop healing the enemy, for instance; neither will it negate THEIR attack boost from Huge Power. Use Gastro Acid/Worry Seed for that.