It is well known that High-Frequency Shockwaves work on normal species and regular variants. What I am discussing now is Critical Diablos.
It has been stated for some time that High-Frequency Shockwaves deal 0 damage to Critical Monsters. This applies to this case as well.
( 次元臨界ドスギルオスに対して高周衝撃波を発生したら0ダメージが発生する )
Since there were no Critical Monsters to burrow before, this is when it was discovered that High-Frequency Shockwaves cannot be used to cancel the burrow of Critical Monsters. In other words, it turns out that High-Frequency Shockwaves are completely unusable against Critical Monsters. Is this a bug? Or a feature?