Summit

The Summit is a new stage in Super Smash Bros. Brawl, acting as the Ice Climbers stage. It takes place on a huge chunk of ice with a couple of platforms hovering above it. For the first few parts of the fight, the chunk of ice stands firmly still on the top of Icicle Mountain. But, after a certain time passes, the stage breaks off, and lands in the water with mighty force. However, players can still fight while the stage is falling, but the stage will be tilted slightly. Once the stage reaches the water, it will stop tilting to and fro, and will be much easier to stand on. However, this doesn't stop the stage from tilting up and down. The Polar Bear will land on the top of the stage once it has reached the water, and occasionally push it deeper into the water. When this happens, a strange fish creature (that originally appeared in Balloon Fight, never in Ice Climber) will leap out of the water and attack other players. Players are able to fight under the water, so long as their feet touch the ground. Additionally, the platforms on the stage are able to flap up and down.

Trivia

 * This stage was originally titled The Summit, with the word "The" being an official part of the name.
 * Ironically, the world the stage "Icicle Mountain" was set in (Infinite Glacier) suggests the stage never ends, despite it apparently having a top.
 * In the debug menu of Super Smash Bros. Melee, there is a stage named "IceTop", which freezes the game when selected. It is possible that "Summit" was planned to appear in Melee, due to the name "IceTop" (which suggests the level was situated on top of an Ice level, which there only was one).