Hiya, gaiaearth, and welcome to the forum! :D
Our Emulation section has loaaads of amazing hacks, so I'm sure you'll find tons of 'em there. My personal favorite was Shiny Gold, though I had a lot of fun playing Liquid Crystal as well. n_n Are you just a fan of hacks, or do you want to make some yourself, too?
But yeah, while our Emulation section is fantastic, I hope you check some of the other boards out as well~! We're an extremely active community with lots to do, so I'm sure it'll be fun to branch out and get to know the forum. That's up to you though, of course!
Enjoy your stay and feel free to contact me if you need help, okay! <3