Board Thread:General Discussion/@comment-679780-20170306231922/@comment-477304-20170310001136

Again, this is common in fiction.

Sonic's world is highly technologically advanced in general, aside for the aforementioned Eggman and GUN, flying machines such as cars and even sports equipement exist. Even the Space Colony Ark is most advanced than anything we've created and that was built before we had colour TV and space flight was barely achieved. As for the Knuckles Clan, it's implied they're the losing side of the battle and you could argue their war is similar the Roman Empire and the Scots; the Romans were far more advanced yet still struggled to invade Scotland.

They didn't lose to a bunch of Chao, they quite literally trampled them. They lost to a god.