Ooh im glad to hear, https://gbatemp.net/threads/tutorial-building-ntr-custom-firmware-cheat-plugins-w-cheat-menu.411189/ I found this if its any help
I think it would be possible just by overwriting RAM? I was trying to dump it but the plugin kept crashing...
A user on reddit called /u/Fadx managed to build a plugin to check eggs over trading with a plugin in - more here: https://www.reddit.com/r/SVExchange/comments/4nvzu7/checking_pokemon_and_eggs_with_ntr_cfw/
Maybe learn some on your own?