Hatsun is a minor character in Sonic the Hedgehog (2006).
Hatsun appears in the warehouse district shortly after Silver completes his ninth Town Mission, "Protect the Barrels in the Warehouse District!", in which he must defend explosive barrels for a warehouse worker named Roberta in New City, Soleanna. Hatsun only appears at this very portion of the game, will be gone after the player progresses further with anything, and in no other storyline. He plays no role in the story whatsoever and his only line is "coo".
- Hatsun is the only non-anthropomorphic animal in the game who can be spoken to.
- If the player does the wall glitch with Shadow in the Soleanna Castle Town after completing Mission 15, the player can enter into a different version of Soleanna New City where the player can also see Hatsun in the Warehouse District as Shadow rather than Silver.