Spiny ChuChu

ChuChus are a race of blobby, jelly-like creatres that appear throughout the WindWaker. Bizarrely, they also began appearing in Gameboy Advance games afterwards.

The above statement is not true for this particular ChuChu (only appearing in The Legend of Zelda: The Minish Cap)

Unlike previous incarnations, it is actually black. It appears to have a bizarre defence mechanism that turns it into a wall of spike when you come close. Not the brightest creatures ever, these Chus eventually retract their spikes, leaving them vulnerable.

The alternate versions are Rock ChuChu and Purple ChuChu