Voir Adventures of Sonic the Hedgehog, Season 1, Vol. 2 - Episode 19

Part three in the four part series. Robotnik timetravels back to Mobigypt, makes himself a pharoah, and enslaves everbody in an effort to find the gemstone of immortality. Sonic and Tails follow after him, and have to chariot race him, then search "Indiana Jones-Style" in a pyramid for the gem, before sending Robotnik back home.