Mizzo (ミズオ Mizuo) is an enemy in the Subspace Emissary mode in Super Smash Bros. Brawl. It can only be found in a display room in the Battleship Halberd Exterior, along with other Subspace enemies, and can be seen attached to two blue webs and attempts to swim around.

The Mizzo is believed to have been captured by Meta Knight during the assault on the Battleship Halberd and displayed and studied for weaknesses, but Tabuu didn't bother making more. Its appearance and motion suggests that it was originally going to be an enemy encountered in the water.

Also, it would be possible that due to its movements, and the web's presence, that they are on the bottom of above screen trowlons, controlling the movements of Puppits.

Mizzo's trophy can be collected through the Coin Launcher (or All-Star/Boss Battles rest area), though it is very rare.

Trophy description

Mizzo Trophy
Within the battleship Halberd, there's a display room where a number of enemies are on display. On the way there, a number of different enemies obstruct your path, but one enemy appears only in this display room. That enemy is Mizzo. With a round body sprouting arms and legs, its appearance and swimming motions make for an extremely bizarre being.
  • Super Smash Bros. Brawl, 2008