This isn't an epic fail of mine, but one of my friends. My friend got soul silver, and I helped her trade her best pokes of to it from platinum because she was going to give platinum to her brother. She had told be a couple of days back that she'd just gotten the masterball, so I asked her if she still had it. She told me no. I asked her what she'd used it on, and she told me she'd used it to catch an onix. I asked why she'd wasted it on a stupid onix and she replied with, "I wanted one, but it was hard to catch."