As long as a game is declared in a Beta stage, it means it is incomplete. The number after a beta represents its progress. Example, in beta1 you can only get to the first gym, but in beta2 you can get to the next 3 gyms. There are a few reasons why you do NOT want to purchase these games.
Originally Posted by frieza rulezzz
1. What these sellers are offering is illegal, the games are unlicensed by Nintendo and they are infringing on copyright material.
2. The cartridges (not the actual game software mind you) are made for the sole purpose of scamming people, meaning little care is put into the product and you will probably get an early beta which will be unplayable.
3. Even if you got a cartridges with the latest beta on it, chances are the cartridge won't hold a save... or even work.
4. The cartridges aren't molded very well and can damage the pins in the cartridge slot on the system.
I hate the to give you the answer you probably didn't want to hear, but buying one of those cartridges is just a waste of money and will likely leave you with a serious case of "buyer's remorse".