The Shadow in the Brush

The Shadow in the Brush is the first boss battle area in, where the player fights against a Bulborb.

Plot
When the player completes Back-and-Forth Road, a cutscene plays with Captain Olimar inside the S.S. Dolphin. The ship tells him that it detected a massive indigenous creature in the next area, and suggests he be careful. After the treasure is collected and the area is completed, the ship announces it detected a new sector, the Verdant Waterfront, and exclaims how it has a lot of water.

Description
The starting point of the area only goes a small path ahead until it dips into a room with tall grass in the background. This room is too tall to be escaped, and spans around two and a half screen-widths long.