I missed every possible event and special legendary until generation six. I plan on buying an action replay or similar device to get said event items and Pokemon. The question is: which one should I get? Have any of you here had experience using them? For GBA and DS? Preferably one that will work properly and won't fuck my save file.

I see some on Amazon but they supposedly don't work or are fakes according to reviews, so it's made me very hesitate. Please help me /vp/.