Halberd

Halberd is a recurring spear in the series, oftentimes being a mid-ranked spear. It normally provides no special abilities, but it boosts decently high Attack power.

Final Fantasy X
Halberd is a weapon for Kimahri that can be acquired if the weapon has two or three blank ability slots on it.

Final Fantasy XI
There are a few types of Halberds in Final Fantasy XI. The basic "halberd" is mid-level spear that can be crafted, while the San d'Oria manufactures a military issue Royal Squire's Halberd. Adventurers traveling into the exotic dimension of Lumaria have recovered a Love Halberd as spoils from the eponymous Jailor of Love.

Final Fantasy XII
Halberd is a mid-ranked spear that requires 35 LP and the Spears 4 License to wield, and costs 10,000 gil to buy. It provides 66 Attack power.

Final Fantasy Crystal Chronicles
Halberd is a high-ranked spear for Lilty that provides 32 Attack and the Psi Blast Focus Attack. It requires 2x Iron and a Jagged Scythe to create.

Final Fantasy Crystal Chronicles: Echoes of Time
Halberd is a mid-ranked spear that provides 84 Attack and +25 Stun. It takes 1 slot and cannot be bought.

Vagrant Story
Halberd is the most powerful Great Axe available, boosts Strength by 35 and Range by 4, but lowers Agility by 5.