That's a basic RMXP skill. There are hundreds of tutorials on the Interweb about how to do that.
Also, I'm not a help-desk. If you have questions, ask them in the forum, not to me personally - other people might also benefit from the answer, but not if the question is hidden away in a profile conversation.
Which patch? If you're talking about my hack, it will be released on Thanksgiving. If you're talking about my resource, that is currently on hiatus due to my hack.
Don't hesitate to reply with any questions or comments.
Okay, make sure you ACTUALLY repointed the type chart, as in, replaced all the pointers to it. And also, double check you put the right hex for "Fairy Dark 2x" in the chart. Also double check that you are actually using a Fairy type move. If it doesn't work after all that, I think you should redo that entire process just to be extremely sure. If it doesn't work after all of THAT. Well, we'll see when we get there.
Yes, it probably is. Somebody else has reported a bug too. I admit that it was a quite a while ago, and I've been lazy in fixing it. I've suffered a lack of will to program anything pokemon-related for the last year or so, and for that I apologize. I'll try to work up the courage to correct the error and make a new version soon.
Can you provide the exact steps that you do to cause/replicate the bug? Is it only the contest appeal that gets messed up? Such things would help me out a bunch. Have any other suggestions/problems?