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Fuzzlers are caterpillar-like enemies that appear in Super Mario 3D World, and are predominantly seen in Switchboard Falls. Their names are a portmanteau of Fuzzy and Wiggler, which they resemble a cross between.
Fuzzlers are made up of different-colored spiky balls that hurt the player upon contact. Fuzzlers always appear on Switchboard tracks, and roll along the tracks in a set path. Two or more Fuzzlers usually appear in a track network, each one going a separate direction. When Fuzzlers collide, they will start moving in the other direction. They can only be defeated with an invincible powerup.