Further info: I’ve been searching for a mold breaker nature Drilbur, in that cave near midna town for hours! but i only manage to find sand force and such :c Would appreciate if someone were willing to trade
Hidden Ability pokemon can only be caught in Friend safari https://wiki.p-insurgence.com/Friend_Safari
And drillbur is a 3rd slot pokemon which require 6 gyms.
If you are online in 11-12 hours and no one traded you one, then I could trade you one.
This contains an explanation regarding how to trade.
In case you don’t understand Pokemon breeding, male Pokemon can bred the hidden ability but only with Ditto. Because of that, a female Pokemon with hidden ability is preferred in case some egg moves are wanted.