I hadn't really owned a cheat device since the GB/GBC gameshark quite a while ago, however I recently purchased an Action Replay Max from codejunkies.com, in order to get access to the event islands in Emerald and FireRed.
I recieved the AR a couple days ago, and I found these codes for Emerald today, which are actual enablers for the in-game event as opposed to just warp codes to the islands:
My main question regarding these, is whether or not using the AR will leave some kind of trace in my save file. I'm not that familiar with the way the GBA/SP Action Replay works, so right now I'm just holding off until I get the opinion of someone with a bit more experience. I'm hoping that these codes are designed to trigger the same flag in the save that recieving the tickets via mystery gift would've at the action event.
If using it will leave some kind of evidence, what I'll probably do is backup my unmodified save file, use the codes, capture the Pokemon on the islands, trade them to another game, and then restore Emerald to its unmodified state.
I'm hoping I'll be able to find some similar enabler codes for FireRed, as well. I haven't looked into those yet, though.