User blog comment:Element02/Hacked Cartridges/@comment-24223729-20140412145351/@comment-6907100-20140421000340

Some are good and some are bad, really, it's hit and miss with these.

Some just play with different dialogue, some add their own custom Pokemon so yeah...again, it really just depends on what you get. But, you see stuff like this on eBay all the time.