- For other enemies with the same name, please see Sandworm (disambiguation).
Its appearance is similar to a large centipede. It attacks by jumping out of the sand in the Oil Desert Zone. It has the same name as a previous robot and a similar color scheme to another. Sandworms also have a more violent-looking appearance.
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- A newly developed large Centipede type Badnik designed for use in desert areas. You never know when they will suddenly emerge from quicksand, and be mindful of its robust body that is resistant to attacks.
Sandworms appear with a slightly different design, and the name Caterkiller in the Another Time, Another Place universe. Two Caterkillers appeared to attack and capture Tails and Shadow when they were competing in the Olympic games.
- Sandworm is the only badnik that appears in Sonic the Hedgehog 4: Episode II to be an entirely different Badnik with the same name as a previous one.
- Sandworm is also the only Badnik in Sonic the Hedgehog 4: Episode II that is resistant to every type of attack. Therefore, it is impossible to tell if it contains an animal.