Hey, I got your Nest Ball Ferroseed ready. Also, upon closer inspection of my PC boxes, I found out I had a Dream Ball Cottonee. So I went ahead and bred one up for you as well, in case you still need it. Just tell me when you're available to trade and I'll try to get online during that time.
Hey! I'm trying to keep my giveaway thread on topic, so I'll answer here :P There isn't one nature you would absolutely want for a Phantump because it's versatile. a VGC set would normally have a Brave or Relaxed Trevevant, while in singles, Careful is probably the best for a bulky set, or Adamant for an offensive one. If I had to pick just one, I would pick Brave, but all the options are good!