I know ASM pretty well, but I have a friend who's an expert on hacking so I have him if I need help :) I usually hack the 3rd gen as well. Can you modify trainer sprites?
I just read the creepypasta. It sounds like this hack will be good. What are you using as a ROM Base? Also, I hope you know ASM because there is some stuff that might require it. I unfortunately can't help as much as I want to but if you have any questions you could ask me I hack 3rd gen so if it's a 1/2/4/5th gen hack, I can't help. If you need sprites you know where to go. Bye!
~Sincerely
PikakittenX, devout member of the Pokecommunity