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Spending most of its time tunnelling under the seabed, it needs to come to the surface occasionally to harden its skin. It bursts out of the sea at such velocity it almost looks like it is flying, and is commonly misidentified as a young Gyarados.

There is a magnet in its brain that prevents an Woonix from losing direction while tunneling. Woonix usually live in water but come out onto land seeking food occasionally.