I know this, thank you but I just thought it would be nice to change this for all users so they don't start asking why they can't pick up items anymore. Since Gen 7, you can't discard items anymore.
I tested more of the BD 1.1.1 codes and the "Ignore Evolution Conditions" code doesn't work, too. I really need this one!
The Unlimited Digging, Instant Lightstones and Instant Egg Hatch codes work as expected.
All codes that change things on Pokemon you get or encounter, like the Shiny and 31 IV codes, don't work on Pokemon from the Underground. This was also the case in 1.1.0.