The Halberd is a giant flying battleship built and commanded by Meta Knight in the Kirby series. Debuting in Kirby Super Star, it's initially used by Meta Knight in an (unsuccessful) attempt to conquer Dream Land. Since then, it has continued to serve as Meta Knight's main base of operations.
It also appears in the anime as well as Super Smash Bros.
It's also Kirby's main weapon used to fight Star Dream, courtesy of the Robobot Armor