The Giant Walker is a giant, skeleton-like creature with blue flames surrounding its face.
The Giant Walker appears at the end of the neutral mission's path of Cryptic Castle in Shadow the Hedgehog. It is immune to damage and cannot be killed. It chases Shadow down a set of three grind rails. In order to escape from it, Shadow must perform 180s or use the Dash Rings to stay ahead of the monster. The first Dash Ring is located on the left rail and the second is on the right rail. However, if the Giant Walker catches up to and touches Shadow, he falls off the rails and the player will lose a life.
- The Giant Walker appears to be of mysterious origin, as neither Eggman nor Amy seem to know what it is or why it is there. Eggman in particular was not even aware of the underground area where the Giant Walker resided.