Heyas,
Looks like there’s an issue with Mydnight’s Duke/King of Terror bonuses rather than with Bone Puppy itself. I’ve reported it.
For Scarebear the Bonuses are applying but the Pet art isn’t displaying on the Mystic General Bonus. So it’s just a visual issue for Scarebear.
Here’s screenshots from my tests of my Mystic General Bonus:
Before acquiring Scarebear:
After acquiring Scarebear:
