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This article contains information that has been informally leaked.
The leak happened, either intentionally or by accident, before a formal announcement was made by an official source, so it should not be considered a confirmed feature at all.
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Butter Building (バタービルディング) is a presumed stage in Super Smash Flash 2. The stage was initially leaked via CR Drake's livestream. Besides a placeholder stage icon, there is nothing else to show for the stage at this point in time. However, according to former developer RoyMaster4, the stage would be a vertically scrolling level in the vein of Melee's Icicle Mountain and Brawl's Rumble Falls. This stage may or may not be a future addition in the game.
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Leaked shots
Screengrab from Ya Dad's livestream showing Butter Building on the third row.
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