Shadow was presumed dead at the end of Sonic Adventure 2, but was revealed to have survived in Sonic Heroes. Eggman, meanwhile, survives the events of the Dreamcast game and lives to bother Sonic ...

Plus, Sonic Adventure 2 was already planning to introduce a character named Shadow. However, this character was eventually renamed to Rouge the Bat, freeing up the name "Shadow" for Sonic's edgy ...

Shadow seemingly dying in Sonic Adventure 2 made it seem like he would never appear again, but the newly fan-favorite character would make his return in Sonic Heroes as he suffered from amnesia.