This is because Generation Three, Two, and One games are much easier to hack due to the games being in 2D. Generation Four and Five games are much more complex, and takes time to produce the technology to hack them. Generation Three games are also smaller in size, meaning data can be read much easier. Of course, discussion of ROMs is against the rules, iirc, so I'd rather just stop there with my explanation.Something I really wondered, why was it that during the release of gen 3 games for the GBA like firered, leafgreen, ruby and sapphire, hundreds of fake games followed? And during gen 4, I can barely find any fake.