In the version of A-map I own, it has a list of the percentages next to the wild Pokemon slots. But if yours doesnt, for the grass Pokemon, the percentages are 20%, 20%, 10%, 10%, 10%, 10%, 5%, 5%, 4%, 4%, 1%, 1%, from the top of the list to the bottom, respectively. There's no real way to make something appear in less than 1% of all wild battles.
Ahh thank you man, that's useful. In my versioun these percentages are not shown, but that's exactly what I meant, thanks
And just out of curiousity, which version do you have? Mine is 1.92, and I was told it's the latest one ??