[Other] Change the Pokemon Oak sends out?

Now I know that the tool Advanced IntroEd exists, but I wanna make it a Pokemon from the expanded dex, but seeing that Advanced IntroEd doesn't have an ini.. I can't. I assumed it would be maximum about 4 byte changes, since it's just the Pokemon, I'm gonna do the cry later, but that wasn't what happened. So I tried this in a clean rom: (1D is Nidoran F, 1E is Nidorina and the things in yellow are the changes)


Now, say for my hack I want to add Turtwig, whose index number is 1B8 or 440. How would I do that? Thanks.