Lava_Serpant
Basically the Mummy 1999 but with a bit of a twist. (Sonadow).
Sonic stumbles upon an old trinket that looked really important so he took it to Sonia, his book smart sister, who discovers it was the key to finding Hamanaptra. Ancient city of the dead. Always ready for adventure Sonic was all set to be there for Sonia every step of the way. Until she insists they bring the very person who found the artefact in the first place.
Shadow the Hedgehog, broody, emo, rival Shadow.
Just when Sonic thinks it can't get any worse a undead mummy is awakened and becomes convinced Sonic is his ancestor and won't take no for an answer. It's a race against time as the three work to send this undead stalker back to the underworld.
Sonic's never lost a race before, but there's a first time for everything right?