The history of the Underground is told in detail, from the fall of Mobotropolis to the rise of Robotnik.
Did You Know?
During the scene where Sonic is about to leave on a mission to Robotropolis, Uncle Chuck says "come on boy, jelly and jam time!" in which case, Sonic corrects him by saying "That's JUICE and jam time". This is a reference to Ben Hurst accidentally writing "Jelly and jam time" a few times in Sonic the Hedgehog
(1993) in which the correct phrase is also "Juice and jam time". See more
Oh, you mean like import-export?
No, like a thief!
References Sonic the Hedgehog