Final Fortress

The Final Fortress, sometimes called the "Whale Shark", is a giant whale shark-shaped battle flagship that stands at the heart of the Eggman Fleet, which are both designed and commanded by the power-mad scientist Dr. Eggman as he leads his evil Empire's most massive armada on his never-ending quest for total domination. It made its first appearance in Sonic Heroes as the final stage, and as 3 different racing tracks in the racing videogame Sonic & Sega All-Stars Racing. The Final Fortress is located at the center of the Eggman Fleet itself, and seems to be permanently surrounded in rough weather. Sonic (as Modern Sonic) fights the Egg Emperor at the Final Fortress in the Nintendo 3DS version of Sonic Generations.