Question about Animal Crossing.

What's the difference between Animal Crossing (no version number) and the other one that's labeled v1.1?

V1.1 has bug fixes in it.

Thanks for the clarification. Also I read in the comment about cheats for v1.1 that some don't work, but I think it was saying that just ones from v1.0 and it seems there are others for v1.1. I don't like to use cheats, but my cousin does and that who I've been downloading games for so. Should I maybe go to technical help are do you know if there are two different code lists for each version? Probable the best way is just to test it out some of the cheats right now
wouldn't it?

There's a different cheatset for each versions. If you're using a flash cart, it'll determine it.

V1.1 has edited/new sprites.The AR codes for each version also differ.