Hanenbow

From the Super Mario Wiki

The stage.

Hanenbow (Japanese エレクトロプランクトン Erekutoropurankuton "Electroplankton") is an unlockable stage in the game Super Smash Bros. Brawl, from the game Electroplankton, unlocked by beating Event Match 28: Flower Blooms in the Echoes. This stage is a leafy, swamp-like place. The leaves, if attacked, will rock and turn yellow then red. There are Hanenbow that fly around the stage, bouncing off the leaves and can hit players. There is also water at the bottom of the stage which acts like a Bottomless Pit. This is one of three stages to have its own icon (a Nanocarp) without having a playable character to go alongside it, the others being Smashville, and PictoChat. Other than this stage, Electroplankton also gets a few stickers.

[edit] Trivia

• Hanenbow does not have any music. Players cannot add any music to the stage, not even through the My Music mode, as Hanenbow does not appear in "My Music" even after being unlocked. This is because the leaves create various tones when hit, which would interfere with any music playing.
• In Hanenbow, players are completely flat, similar to the stages Flat Zone and Flat Zone 2.