The following items are nullified by the use of Protective Pads:
- Rocky Helmet
- Sticky Barb
- Jaboca Berry (This might be wrong, I'm assuming this and this alone from the OR/AS Battle Mansion)
Source is Bulbapedia.
I am not sure if moves are affected by this, will confirm on PS! and edit in a bit.
EDIT: Tried it on PS!
Protective Pads prevent Baneful Bunker, Kig's Shield and Spiky from carrying out their secondary effects. Beak Blast is unaffected.
Edit 2: Realized Beak Blast did not work because of Marowak's typing, so it works people, I got that wrong.