Blue ChuChu (The Legend of Zelda: Spirit Tracks)

Metal Chuchus are a near invulnerable type of shiny gray Chuchu found in The Legend of Zelda: Spirit Tracks, initially appearing in the Ocean Temple. They act essentially as an even stronger version of the electrified blue Chuchus found in many previous games. Like them, their bodies are constantly electrified. Metal Chuchus, however, are unaffected by most weapons, including the boomerang and direct attacks from the whip. Additionally, they constantly move around at a high speed. To defeat them, Link can use bombs or throw certain objects using the whip. The helmets of Helmet Chuchus and the large swords dispensed from the anglerfish-like gargoyles in the temple are both effective.