Nah, it not working on 3 different honey trees and the berries tree also not growing. It seem like they implement the old gen IV game clock that separated from sysclock and punish your for cheating by reset said clock if it go wrong.
I manage to get it to work. Not sure if you're doing it right or its because you have a 24 hour lock. You should skip 24 hours, slap honey on a tree and then increase the time by 6 hours within the homebrew app i provided.
In my Brilliant Diamond mod directory, i created a folder cheats then created a txt file named D9E96FB92878E345.txt in it. I only use max pokedollar and 999 all ball cheat but when i started the game it does not respond at all
You have Arceus's and Manaphy's Encounter Codes included in the .txt for Brilliant Diamond/Shining Pearl; here's the encounter codes for Celebi and Deoxy's as currently AFAIK there's no possible way in-game to obtain them as well without using these codes.