Here is my G-Rank Black Fatalis video guide for Monster Hunter Freedom Unite. There have been a lot of questions about meleeing Black Fatalis and i hope this could answer most of those questions especially those who use Greatswords on Fatalis.
By the way, use PAUSE to read some of the lines on the introduction. I had to cut the time down to 10 mins... :)
Songs used in the video: Psience - Eschaton Psience - Depth Charge Psience - Brainfreeze
Weapon and Armor sets used: King Attilart Sword - Full Rathalos X - Sharpness+1, Unsheathe, Atk Up Lrg Tigrex Supreme - Rathalos X with RathSoul Z Gloves - HGE, Unsheathe, Atk Up Med Eternal Destroyer - Kirin X / Kushala X / Cean Z - Sharpness+1, Sharp Sword, Elemental Atk Up Killer's Carver - Full Jolly Roger - Carving Celeb, Good Luck, Bomber
Edit: Added Jolly Roger Set to desc. Thanks to ragv162 for pointing this out.