We had a topic going for special items that were dropped by doing something unique, unfortunately it got purged... So now I am filling in this topic from memory.
The stats are coming from the wiki, so it is very possible that the stats are wrong. However the item drops themselves have been confirmed. Stats are listed as follows: Damage: Physical/Magic/Lightning/Flame/Critical Required stats: Str/Dex/Int/Faith Damage Multiplier: Str/Dex/Int/Faith
1. The very beginning tutorial boss. Beat him w/o getting your equipment first (you will have to PUNCH him to death) and you will get the Demon's Great Hammer: 260/0/0/0 46/0/0/0 B/-/-/-
2. Priscilla The Crossbreed, cut her tail off. Priscilla Dagger: 80/0/0/0/100 6/20/0/0 -/A/-/-
3. Hellkite Dragon, cut tail off. 200/0/0/0/100 16/10/0/0 -/-/-/- **This can be done very early in the game and is quite useful for early game**
4. Ancient Stone Dragon, cut tail off. Dragon Greatsword: 360/0/0/0/100 50/10/0/0 -/-/-/-
7. Mecha Boar: Supposedly attacking his head continuously will lead to the drop of the Mega Boar Helm. However this method has not been confirmed, it is very possible it's just a rare drop from the boar.
Brawl Code: 1032-0922-1772 Brawl Name: D RIP: Orlando of the Axe Karma: 1642 --he delivered!