|This character exists primarily within the Adventures of Sonic the Hedgehog continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
In the times of Pirates, a lonely treasure chest lay buried on Shark Island with the Chaos Emerald of Invisibility inside. After a scuffle with Sonic the Hedgehog Dr. Robotnik obtained the Chaos Emerald of Invisibility and then used the Chaos Emerald of Life to transform the treasure chest into a living crab creature. The Treasure Chest Crab ate Sonic, trapping him inside himself. Tails befriended a female crab and got her to bat her eyes at the Treasure Chest Crab who dropped his jaw, allowing Sonic to escape. The last time the Treasure Chest Crab was seen, he was being chased by the female crab, angry and swinging a rolling pin.
- Treasure Chest Crab looks remarkably like Crabmeat.