I'm trying to make 18 have the best moves ever. Any suggestions? I would really appreciate it, thanks.

I cannot remember many 18 moves offhand but my suggestion if you are basically an offensive character then get a breakthrough with her, then check recommended loads and any moves she can use buy them then you can use every move she has eventually and then you can own your mates ^^

She has only 5 attacks I believe. Same moves as #17. So I would use all 5, and then use support. When you get all the Dragonballs and you want to use them, save, use them, and restart if it doesn't give you #18.