Hi there Jhiel and welcome!
To be quite honest I haven't heard of Drastic before. The only NDS emulator I really know of is Desmune, which I think does the job for me, but I could be wrong on how good it is. I'm not an expert on emulators or ROM hacking myself. I actually never played one. But regardless, like my friend Megan above me said, this is the perfect place to be for ROM Hacking. We have a huge library or hacks already completed or in progress that you can try. And as Megan said, you can get all the help you need on hacking too from tutorials to resources and even building a team.
But besides ROM hacking, you can find a whole lot of things here. What makes this forum great is that you can talk about Pokemon, but also even things not related to Pokemon. For example we have a board for all entertainment including TV shows, movies, music, anime and Japanese culture, and even books. Plus off topic things that we all experience in life. We're friendly place too so you can easily make friends here. So I really hope you can get along well with people here and enjoy your stay. If you ever have any questions or problems, I suggest you to contact a staff member in the bold colors. I'm also more than happy to talk to you so feel free to drop by my profile!
See you later !