Halberd

Battleship Halberd is a new Kirby stage introduced in Super Smash Bros. Brawl. The stage begins in a hangar, which then opens up, letting Meta Knight's airship, named the Halberd, take off. A platform rises from the center, taking the characters with it. It then proceeds to float around in the sky, with the Halberd flying in the background. Later on in the match, the platform lands on the Halberd itself, in front of a cannon and a mechanical arm that can interfere with the match

Battleship Halberd also appears in the Subspace Emissary mode, apparently as the mother ship for all of the Primids, or just a temporary drop-ship. Nothing else has been confirmed about its purpose in the cinematic sense so far.