Kingdom of Acorn (future version)

The dimension of a possible future of the Kingdom of Acorn, where the freedom fighters there defeated their version of Dr. Robotnik (future version). It is ruled by the dimension's Sonic and Sally, who had eventually married with children. (StH: Archie Sonic the Hedgehog Issue 22)

Destruction
Even though they defeated their Dr. Robotnik, the Kingdom of Acorn was destroyed by Robo-Robotnik, who was from another dimension. (StH: Archie Sonic the Hedgehog Issue 75)