When I try to go to 152, it completely messes up and goes to a random height and width, and the image is a bunch of random colours. Is there any other way of making this work? I want to add more OWs but this game hates me. With this tutorial I can add 1, but I can't add anymore then that!
I hate this part in ROM hacking, this is what turns me away form it. If they made adding OWs and Trainer Sprites easier, I would have a much better time!
So you wanted 20 new sprites instead of 1. As you said, if I read correctly, you can edit the first one. Now, did you do anything besides change the 1 to a 20 in the .ini file? If so, you need to basically repeat the entire tutorial starting at step 4. Meaning, each sprite gets their own pointer, data, and frame data.