Galaxy Colosseum

Galaxy Arena (Galaxy Colosseum in North America) is an arena in Mario Kart Wii, that can only be played on during special online tournaments. It is essentially a round platform situated in outer space, in a Super Mario Galaxy/Rainbow Road-themed setting. Thus far, two tournaments have taken place on the arena.

In the tournament which took place between June 1st and June 10th, 2008, players had to compete for the fastest time by knocking a total of four giant Spiked Topmen off the edge of the arena, using only Triple Mushrooms. Players could knock them away with a Mushroom boost.

Also, in the 2nd June tournament of the 15th to the 25th of 2009, it was the same, except the outer rings of the arena broke off, and the player had to send 6 Spiky Topmen off the stage.

According to the map of the stage, the size of this stage differs from each boss battle. This stage is the Mario Kart Wii version of the Water Arena from Mario Kart DS.