Cupid

Hi, currently I am attempting to mod Soul Silver. One of the modifications I am attempting to make, is to make certain genderless Pokemon have genders (setting the ratio to 127 to make them evenly male and female.) However... this keeps causing the Pokemon's sprites to become completely messed up - it basically looks like a big, glitched up square. Also, when attempting to edit saves in Pokesav, it still treats the Pokemon in question as genderless, even though they are not. Setting them back to genderless in PPRE immediately fixes the problem. For the life of me, I cannot figure out what is going wrong here... can anyone offer any advice?

How different is this from Drayano's Sacred Gold and Storm Silver hacks?