[ASM & Hex] How can I fix Shedinja's evolution in FR?

Not matter what I do I can't seem to make Shedinja spawn correctly when evolving Nincada to Ninjask. I'm using Leon's rombase, so the number of evolutions were changed. Can this be done just with a little hex editing or do I have to write a routine?

You probably used the wrong evolution methods, or you have the evolutions per species set incorrectly. Try checking those :)