In the part where he 'held up a finger' it was supposed to look like it could be either oneSo they could get Crap Past the Radar.
This takes place in an AU where the Space Colony ARK fell.Hence why the planet is ruined. The only reason why there's even an Earth is because somebody managed to remove the Emeralds before the colony hit the planet. The reason for the world of the Sky is because of the Chaos Emeralds.
- Alternatively, Gerald succeeded in his Colony Drop while still alive due to GUN unable to locate him. The reason Earth even exists is because, without the Chaos Emeralds, the ARK "merely" caused an extinction event similar to the event that wiped out the dinosaurs, or worse, the Great Dying. The survivors used the Chaos Emeralds to escape. This Eggman's desire to destroy the Land of the Sky comes from not just a desire to father a new mankind, but Gerald/an instructed Biolizard surviving the Colony Drop and inspiring decades of omnicidal mania to Eggman's upbringing.
Planet Freedom and Arcadia are one and the same.Both have inhabited Floating Continents and a desolate, uninhabited surface. The two areas are separated by a thick cloud layer, which can only be crossed through a vortex. Said vortex has a very chaotic environment and will destroy most ships.